PDF malware analysis — malicious · f9f131315387073d

MALICIOUS

PDF

7.5 KB Created: 2009-12-17 16:59:10 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 56afc7a47d2184180191e7c4ab4fe118 SHA-1: 325e18a45384730b8791907286487c826b71c2db SHA-256: f9f131315387073dbeb6bf4422f241fd69437940c9873b5747fd4b3b24e623c0

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. A critical heuristic firing for CVE-2009-4324 (media.newPlayer) suggests exploitation of this vulnerability. The embedded JavaScript is likely designed to download and execute a second-stage payload, although the exact functionality is obscured. The presence of a suspicious extracted JavaScript file further supports this assessment.

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded 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_obj0021_000.js` `52a2ad4993cf758b5b9f98c12d3de6f2477eee4bf11f875334587647d381c662`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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