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PDF Password Cracker Enterprise

An excellent PDF password crack Software.

PDF Password Cracker Enterprise edition allows to search for "owner" and "user" passwords with brute-force and dictionary attacks, effectively optimized for speed (however, don't expect to recover long passwords in a reasonable time with these attacks). In addition, it has Key search attack, which guarantees the decryption (regardless the password length and complexity) of PDF files that use 40-bit encryption (the attack takes about 3-4 days on fast CPU systems).

The standard security provided by PDF consists of two different methods and two different passwords. Owner Password allows to prevent PDF file from printing, editing (changing), selecting text and graphics (and copying them into the Clipboard), or adding/changing annotations and form fields; User Password locks the file so the password is required to open or view the file. If only owner password is set, decryption is being done instantly; decrypted file can be opened in any PDF viewer (e.g. Adobe Acrobat Reader) without any restrictions, i.e. with edit/copy/print/annotate functions enabled. Alternatively, owner password can be recovered using brute-force or dictionary attacks.

PDF Password Cracker Enterprise can Remove more security options from PDF file, such as Remove metadata, Remove javascript actions, Remove embedded thumbnails, Remove all comments, Remove embedded file, Remove bookmarks, Remove private data, Remove named destination, Remove all form actions, Remove digital signatures, Recompress data streams.

Additionally, PDF Password Cracker Enterprise supports "key search" attack that allows to decrypt (in a reasonable time) PDF files with 40-bit security regardless the password length, guaranteed.

See Also:
PDF Password Cracker Standard Edition
PDF Password Cracker Professional Edition

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PDF Password Cracker Enterprise Key Features

  • Easy to use.
  • Drag and drop PDF files.
  • Do NOT need Adobe Acrobat software.
  • Support Windows 98, ME, NT, 2000, XP, 2003, Vista Systems.
  • Support PDF 1.7 (Acrobat 8.x) files, including 40-bit RC4 decryption, 128-bit RC4 decryption, AES decryption, compressed files and unencrypted metadata.
  • Support Adobe Standard 40-bit decryption, Adobe Advanced 128-bit decryption and AES decryption.
  • Recovers user password required to open the file.
  • Brute-Force, or Dictionary attacks are used to recover the password.
  • Additional user dictionaries support, case changes, multiple mistypes and other modifications for each dictionary word.
  • Program automatically saves password search state and can resume after a stop or a crash.
  • Patterns can be used to minimize search time if any part of the password is known.
    Non-English characters in passwords are supported.
  • Remove more security options from PDF file: Remove metadata, Remove javascript actions, Remove embedded thumbnails, Remove all comments, Remove embedded file, Remove bookmarks, Remove private data, Remove named destination, Remove all form actions, Remove digital signatures, Recompress data streams.

How to use the PDF Password Cracker Enterprise?

  • Open the PDF Password Cracker Enterprise program by either going to Programs, select PDF Password Cracker Enterprise v3.0 and click PDF Password Cracker Enterprise v3.0. The interface below will display.
  • Click the "Load" button to locate the file which you would like to remove the passwords, then click the "Open" button.
  • Click the "Decrypt" button or "Start" button, then PDF Password Cracker Enterprise will test the passwords for your PDF file automatically.
  • Once PDF Password Cracker Enterprise retrieved the user password, it will popup a "Save As" dialog, you may save to a normal PDF file directly, all restrictions will be removed from this decrypted PDF file.

Use PDF Password Cracker Software

Load: Open PDF file for retrieve password.
Decrypt: Decrypt current PDF file.
Type of attack:
Brute-force: Brute force attack for PDF file.
Dictionary: Construct user password from a dictionary file.
Key search: Search file key for a 40-bit encryption PDF file, the key length is 40 bits, so the total number of keys is 2^40, or 1,099,511,627,776, the whole recovery process takes about 30 days on PIII-450 computer, and the average is just 15 days.
All caps latin (A-Z): ABCDEFGHIJKLMNOPQRSTUVWXYZ
All small latin (a-z): abcdefghjiklmnopqrstuvwxyz
All digits (0-9): 0123456789
All special symbols (!@...): `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
Space: Space character
All printable: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghjiklmnopqrstuvwxyz0123456789 `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
User defined characters: User defined characters for construct passwords
Minimal password length: Minimal length for passwords.
Maximal password length: Maximal length for passwords.
Start from: First password to be tried.
End at: Last password to be tried.
Dictionary file path: Load a dictionary file for dictionary attack.
Try all possible upper/lower case combinations: Construct passwords from dictionary file automatically.

Remove more security options from PDF:

  • Remove metadata
    Enable this option to strip any XML-based metadata (as opposed to the Summary metadata described in “Metadata”) from the PDF file. Often metadata is inserted for tracking or certification purposes that may no longer be needed in the downsized PDF. An example of such metadata is Adobe XMP.
  • Remove javascript code
    PDFs may include pieces of the JavaScript programming language in order to enable interactive or intelligent documents and forms. Such elements serve no purpose when printing, and should be removed. These code fragments are also not permitted by international standards such as PDF/X or PDF/A and should be removed there also.
  • Remove embedded thumbnails
    Since Acrobat 5 and 6, as well as Mac OS X’s Preview application are capable of creating thumbnails on the fly there is no reason to include pre-built thumbnails in the PDF. Enabling this option can therefore save file space without impacting viewers.
  • Remove all comments
    Remove all comments and annotations from PDF file.
  • Remove embedded file
    Since a PDF file can be used as a “digital envelope”, it is possible to embed other files directly into a PDF file (much like one might do with a StuffIt or Zip archive). This is quite useful when sending the document to people who can make use of the embedded information, but it certainly wouldn’t serve any purpose when printing a document.
  • Remove bookmarks
    The hierarchical list of common places to go to in a document is important when viewing the document on screen, but when being printed, such information only serves to waste space and slow down transmission to the RIP and should therefore be removed.
  • Remove private data
    Many of Adobe’s applications, especially Adobe Photoshop and Adobe Illustrator add application specific information to PDF files. In addition, many third party Acrobat plug-ins can also add private information into PDF files. This information is used by these applications to allow you to fully edit PDF files created by these applications. But once you have completed editing of the document, and certainly before distributing it, it is a good idea to remove such information as it will often reduce the PDF as much as 50 percent. Of course, the PDF file can still be edited with Acrobat and other general PDF editing tools.
  • Remove named destination
    PDF files can contain a list of named destinations for links, similar to anchors (<a>) in HTML documents. When being printed, such information only serves to waste space and slow down transmission to the RIP and should therefore be removed.
  • Remove all form actions
    Acrobat Form fields may have commands (called Actions) associated with them that enable Acrobat to initiate functions such as opening other files, submitting or resetting form data, playing movies and more. If you aren’t flattening or removing your form fields, but wish to make your PDF inactive from unexpected behaviors or in preparation for printing, you should enable this checkbox.
  • Remove digital signatures
    Remove digital signatures from PDF file.
  • Recompress data streams
    When enabled (the default), PDF Password Cracker Enterprise will recompress the text and line art contained in the PDF document. Often this can lead to 10-15% savings due to more efficient compression methods.

Known limitations

  • PDF files protected using PDF Merchant and EBX digital rights management schemes or 3rd party plugins such as FileOpen, SoftLock etc cannot be decrypted.
  • Brute-force attack is effective for short passwords only, usually up to 7-8 chars. Recovering longer ones will take too much time (months, years) even on a very fast computer. If your file has "user" password and use 40-bit encryption, you can use Key search attack.

 

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