PDF malware analysis — malicious · 9c642d9306316f40

MALICIOUS

PDF

1.4 KB

MD5: d1fe0c26cc75a91a7b241a49a53c1201 SHA-1: ff43d3d7bae0905e7432cf6dbdb5f9c3261bc0a9 SHA-256: 9c642d9306316f40517f5330d1bdeb608ee503689a5ea4b3d7cd34d80a45ba26

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, which is obfuscated and uses the unescape() function. A critical heuristic firing indicates exploitation of CVE-2009-4324 via the media.newPlayer object, a known vulnerability for arbitrary JavaScript execution in older Adobe Reader versions. The JavaScript is likely intended to download and execute a second-stage payload.

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)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `3ba48c778733c91b731cc4670b50878a636e05fea45bf54d0a2309b7dafe5500`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1246 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` `b520139425abe4823d07d4ffda8ff5655c1232bed1fd66702d6615cff242979a`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x481	261 bytes

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