PDF malware analysis — malicious · a46268a781ea894c

MALICIOUS

PDF

18.4 KB

MD5: ead3b511f1eb6e816f7ae72ec1e38cf6 SHA-1: dde692eb5cbd03b7be35681e9a3640a617c07d6b SHA-256: a46268a781ea894c50d6448b5dfda1944efb4ed6918e61fdc252dce92a41507e

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample utilizes embedded JavaScript, including calls to eval() and unescape(), to exploit CVE-2009-4324. The obfuscated JavaScript is designed to decode and execute a malicious payload. The ML classifier strongly indicates malicious intent, and the heuristics point to a known exploit kit technique for delivering further stages.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `7ad4157e6d418af3e016561d324dfab837dff8c22e57661ac950d114bb0d8215`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3011 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `66129c72b266e9028f3d230c401e3b11172433eb56aa1b878d55f7d5241ed2eb`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD87	12880 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `9f9e8a3dc481dc193b1a03d899f0dece8cf9515660121a8d83f4bd5591e9b35a`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x400D	2410 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `7b0fa96a964e88541868a14dae8d48b057291f5f0edeecd1c8550f77ddd12bce`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD87	1082 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x400D	165 bytes
`legacy_pdfkit_stage_002.js` `87022f1f84c4fe8bb5bca3dd7aa72ab50ea55c04478d7c3573b173863b35baaa`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD87	1248 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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