PDF malware analysis — malicious · 64edcbf287002717

MALICIOUS

PDF

42.7 KB

MD5: 5995326c70794f1f0e9e616a002fba9b SHA-1: 1cedb206f3dced65d5d959023523964203e8e922 SHA-256: 64edcbf287002717eafc64fac602cd0869d3040c4a75b0976fccef5b236b364a

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains obfuscated JavaScript, which is flagged as a critical exploit. Specifically, the 'unescape()' function and the 'media.newPlayer' object point to CVE-2009-4324, a known vulnerability. The JavaScript code is designed to download and execute a secondary payload, as indicated by the exploit cluster and the ML classifier's high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

Heuristics 7

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)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0006_000.js` `7f3b846184898433fed8e2269c352e90255e713fe5a19d7fe91c17e74b94fa4c`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC0	2973 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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