PDF malware analysis — malicious · 9c739ca03ca698aa

MALICIOUS

PDF

2.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: e6441abe9c1a3bab4b7da6c1f85c538d SHA-1: 5d6bf641e1e87fceac425462b3ced34f4375726a SHA-256: 9c739ca03ca698aa89258b85fe0aaac721d93c3bf40f517142c549f0a3ae62ea

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic firing, specifically mentioning Collab.collectEmailInfo, strongly suggests exploitation of a known vulnerability in Adobe Reader. The unescape() call further points to obfuscated JavaScript intended to perform malicious actions, likely downloading and executing a second-stage payload. No document body text was available for analysis, but the presence of exploit-related heuristics is sufficient for this assessment.

Heuristics 5

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)
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_000.js` `72bdb97676e003b47b655bfa90f85b9254646ada9a8bc893dde497e4e0cab729`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	2088 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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