PDF malware analysis — malicious · df81c726765f6d45

MALICIOUS

PDF

133.0 KB

MD5: 231b3a4739a280eb1d018f6933c318c4 SHA-1: b11ca2cefae9eb370ed2d46ef4c6de6c9a0c5ad3 SHA-256: df81c726765f6d456ea5ee3d60e5a3531615531a302f2b826f8cfc2e91a412f1

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting exploitation of this flaw. The presence of obfuscated JavaScript and a ClamAV detection for ObfuscatedNameObject further support a malicious intent. The primary attack vector appears to be the exploitation of CVE-2009-4324 to trigger the execution of the embedded, obfuscated JavaScript.

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)
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` `763e69540a8cff299d9145ca97b4c65dbd653f3603f252b7c6a0a3988e1a76b6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	4170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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