PDF malware analysis — malicious · b8a85c3b83c866b6

MALICIOUS

PDF

3.5 KB

MD5: b9afb7f4a2b958f3ae61a07f095d1123 SHA-1: 82817ea0d8ed26177fb2601e8370e50b984f893e SHA-256: b8a85c3b83c866b6ae8ea64b9dbefa35976af9828c20ad5c13561395d413b794

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic suggests exploitation of a vulnerability related to media player functionality. The unescape() call further points to obfuscated JavaScript. While the exact script functionality is not fully detailed, the combination of these indicators strongly suggests the execution of malicious code, likely to download and execute a secondary payload or exploit the reader's vulnerabilities.

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` `755990f17089b4449090b8a32764887720dca112505b838dfe5177853bc1e157`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1AD	2436 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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