Extract PDF hash (edit passwd)

[eneru]

Code:

$ ./pdfcrack.exe -f ...

PDF version 1.6
Security Handler: Standard
V: 2
R: 3
P: -1084
Length: 128
Encrypted Metadata: True
FileID: 51765003ed0e2944a8991e710ec8aaa1
U: 6554d929ab86fdd40a078d4e8cefb0ea2e0000000000000059028800188f3b00
O: 34d5f6a6a8766b703d03a9ed1a8e3565f5cd34a85a506332737a70fb429e2bf6

EDIT: Hashcat can't crack this password. Pdfcrack can do it, but much slower...