PDF malware analysis — malicious · c9fc9303e74f0136

MALICIOUS

PDF

1.4 KB

MD5: 5917b767b663141d2594cdfc1bada526 SHA-1: cf36f1852766d3e8cf9a4d1d64194cc634a4edce SHA-256: c9fc9303e74f0136ea654c0d8265b589e5cff81e03f323b16faaf7f02711c2f7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution

The PDF file contains embedded JavaScript, which is triggered by the media.newPlayer object, indicating exploitation of CVE-2009-4324. The JavaScript is obfuscated and uses unescape() for decoding, suggesting it's designed to download and execute a second-stage payload. The extracted JavaScript files and the unescape() heuristic strongly support this attack pattern.

Heuristics 5

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)
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` `2555f45d1593b4c2ad30a62bdb6be6aa23e7d5b376a0ff03b944be4127dc8931`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1262 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` `b7813d3d78a1ff8a652fab85c1967a3b7a4ab3a5e46e16abfcea233b8f362abf`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x486	262 bytes

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