PDF malware analysis — malicious · 9fb2b8bcf23fd59d

MALICIOUS

PDF

2.8 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: d65bb7f1cb0d8f548488550bba1f9ddc SHA-1: 5dedeebbb45aa08aba3f25a36988e0cc81eeda65 SHA-256: 9fb2b8bcf23fd59db6b2a7081e570073f030ef2e83a624af7aac9bbda813e3ab

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and is configured with an OpenAction to trigger its execution upon opening. The 'CVE_2007_5659' heuristic firing indicates exploitation of a known vulnerability related to 'Collab.collectEmailInfo'. The embedded JavaScript stream, identified as 'javascript_obj0013_001.js', is obfuscated and likely responsible for downloading and executing a second-stage payload. The use of JavaScript and a known PDF vulnerability points to a common delivery method for malware.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `366d3ed6429117184a150b61d84a1c8109ac70f8df5b381da892df18e9b24328`	pdf-javascript-stream	PDF /JS object 13 at offset 0x369	2804 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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