PDF malware analysis — malicious · 970ec09726d162a5

MALICIOUS

PDF

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

MD5: 78ee0157424bfe93c5ca38331ebe1381 SHA-1: 646022671d774949f104f1f54bce62df587c3edf SHA-256: 970ec09726d162a51ba3493ecabf65c8b8182d48373085d61fc1b8afe04e2545

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 obfuscated malicious code. The critical heuristic firing for CVE-2009-4324 (media.newPlayer) strongly suggests exploitation of this vulnerability. The JavaScript is likely designed to download and execute a second-stage payload, although the exact mechanism 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` `96eab89f7505eed898b3be76b30d69ef9d11bcfdace7b3e807f903052637cc4b`	pdf-javascript-stream	PDF /JS object 21 at offset 0x1883	621 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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