PDF malware analysis — malicious · 1f2c727193913dc9

MALICIOUS

PDF

1.4 KB

MD5: 451399e64bcab3b529580a59590c4224 SHA-1: 95c9d2c05876641805f08aafa0c15090de01892a SHA-256: 1f2c727193913dc9f02e923a3f10fd8259061da752c625711f55abccd455de1f

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1071.001 Application Layer Protocol: Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 heuristic specifically points to the exploitation of the media.newPlayer vulnerability. The embedded JavaScript, particularly the unescape() call, suggests obfuscation to hide malicious code. This code is likely designed to download and execute a secondary payload, as indicated by the ClamAV detection of Pdf.Dropper.Agent-7237178-0. The extracted file 'javascript_obj111111_000.js' further supports the presence of malicious scripting.

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: Pdf.Dropper.Agent-7237178-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7237178-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `df5ca14ff90a2d67fb064b657204ce887bfc40893fabeb3d90716823b4cf44b0`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1275 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `7d6be750c9fcccc0d854186145a92bff24fbff98602d039d01b0fe9788b93e1f`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48B	264 bytes

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