PDF malware analysis — malicious · 977fbfe658f8cef6

MALICIOUS

PDF

3.8 KB

MD5: 80826873cee1a9890fa34e31d6ce4a59 SHA-1: f7d316584f369f6a605081419238084ab49432b4 SHA-256: 977fbfe658f8cef6a9789ee4eea3eeff635b2825a839b14b61dfd4a91f808db3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious Link/URL

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 execution. While the exact script functionality is not fully detailed, the presence of these indicators strongly suggests the script is designed to download and execute a second-stage payload, leveraging the identified PDF vulnerability.

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` `c623a05ad319280dc091c69e628dcc67cac0587eb63d5b31a3caa4f18d93e8db`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	2803 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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