invalid dictOwnerPass prevents further processing

[GoogleCodeExporter]

What steps will reproduce the problem?
1.https://www.virustotal.com/en/file/784d1ebd1faccec27f98970cc266859eaf5676da1c4
51e3304fb55435d8c8473/analysis/
2. run peepdf.py -f vtfile

What is the expected output? What do you see instead?

#Expected:

Warning: PyV8 is not installed!!
Warning: pylibemu is not installed!!
Decryption error: Bad format for /O!!
Decryption error: Bad format for /U!!
Decryption error: Default user password not working here!!

File: tp_22340_utf8_88292d7181514fda5390292d73da28d4
MD5: 88292d7181514fda5390292d73da28d4
SHA1: fbc3856fd689e1ac0f8fb56bbd7d0a2b8332a928
Size: 807079 bytes
Version: 1.4
Binary: True
Linearized: False
Encrypted: True (RC4 40 bits)
Updates: 0
Objects: 7
Streams: 1
Comments: 0
Errors: 5

Version 0:
    Catalog: 1
    Info: No
    Objects (7): [1, 2, 3, 4, 5, 8, 9]
        Errors (1): [5]
    Streams (1): [5]
        Encoded (1): [5]
        Decoding errors (1): [5]
    Suspicious elements:
        /AcroForm: [1]
        /OpenAction: [1]
        /JS: [1]
        /JavaScript: [1]

#Instead see:

Traceback (most recent call last):
  File "peepdf.py", line 352, in <module>
    ret,pdf = pdfParser.parse(fileName, options.isForceMode, options.isLooseMode, options.isManualAnalysis)
  File "/Users/tross/Code/satori/peepdf_service/peepdf-svn/PDFCore.py", line 6822, in parse
    ret = pdfFile.decrypt()
  File "/Users/tross/Code/satori/peepdf_service/peepdf-svn/PDFCore.py", line 5179, in decrypt
    ret = computeUserPass(password, dictO, fileId, perm, keyLength, revision, encryptMetadata)
  File "/Users/tross/Code/satori/peepdf_service/peepdf-svn/PDFCrypto.py", line 164, in computeUserPass
    ret = computeEncryptionKey(userPassString, dictO, dictU, dictOE, dictUE, fileID, pElement, keyLength, revision, encryptMetadata)
  File "/Users/tross/Code/satori/peepdf_service/peepdf-svn/PDFCrypto.py", line 58, in computeEncryptionKey
    md5input = password + dictOwnerPass + struct.pack('<I',abs(int(pElement))) + fileID
TypeError: cannot concatenate 'str' and 'instance' objects

What version of the product are you using? On what operating system?
latest version from svn, any os

Please provide any additional information below.
when forcing and encountering errors and the dict0/dictOwnerPass object doesn't 
resolve to a simple string and therefore hinders further execution.

Original issue reported on code.google.com by KAK.BO....@gmail.com on 5 Sep 2013 at 3:35

Attachments:

• PDFCore.py_patch

[GoogleCodeExporter]

Hi! 

Thanks for reporting this bug :) I don't have access to VirusTotal samples, 
could you send the sample to peepdf at eternal-todo.com, please? Maybe better 
in a zip + password...

Thanks!

Original comment by josemigu...@gmail.com on 8 Sep 2013 at 7:00

[GoogleCodeExporter]

This issue was closed by revision r201.

Original comment by josemigu...@gmail.com on 9 Sep 2013 at 10:22

• Changed state: Fixed