PDF malware analysis — malicious · 2a8079aebcea94d0

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: 1b7c9ccaa9d43dad5d7590221883c9e2 SHA-1: c729a493425fff1716a5ad890e8d8d53deb4c7ff SHA-256: 2a8079aebcea94d07592d826c294eb28b321e71080f0e65e28bd38a30d6b398f

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting vulnerabilities. The critical CVE-2007-5659 heuristic firing indicates the use of the Collab.collectEmailInfo method, a known vector for arbitrary JavaScript execution in older Adobe Reader versions. The embedded JavaScript stream, named 'javascript_obj0013_001.js', likely contains obfuscated code designed to download and execute a secondary payload, contributing to the malicious verdict.

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` `130004352e16cf9b3357d84e9e5dc9303b3552cf53a89c6afd508060408194d3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x365	2748 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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