PDF Password Cracker Professional 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).

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