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.
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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.
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 1.8 (Acrobat 9.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.
Known limitations:- 1. PDF files protected using PDF Merchant and EBX digital rights management schemes or 3rd party plugins such as FileOpen, SoftLock etc cannot be decrypted.
- 2. 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.
