3 ms·

This is what I get: 20 0 obj << /R 4 /O (...) /U (...) /P -1548 /Length 128 /V 4 /EncryptMetadata true /Fil

This is what I get: 20 0 obj << /R 4 /O (...) /U (...) /P -1548 /Length 128 /V 4 /EncryptMetadata true /Filter /Standard /StmF /StdCF /StrF /StdCF /CF << /StdCF << /AuthEvent /DocOpen /CFM /AESV2 >>>>>> endobj I tried a bunch of tools, including https://www.elcomsoft.com/apdfpr.html?src=prog_apdfprp https://www.elcomsoft.com/apdfpr.html?src=prog_apdfprp to get it to quickly remove the password, but nothing worked :/

tyingq 3y ago
Ah, that's the exception to my "generally" comment. That "/CFM /AESV2" means AES-128, instead of the much weaker RC4...which would be if you saw "/CFM /V2". So you're left with brute force or dictionary attacks for your 10 char A-Za-z0-9 password.
- mvelbaum 3y ago
  thanks! :)