PDF malware analysis — malicious · 412ea6e1fe90a715

MALICIOUS

PDF

16.2 KB

MD5: 414893fa2dfdbe8499b4cb477c4ae6f6 SHA-1: fa703f13dd9523f39aba63628f7a7b521de89009 SHA-256: 412ea6e1fe90a715d51c3892a6e331f9762a52f4d3b6c39f1ec1ea7ca5ab408b

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating an attempt to obfuscate malicious code. The critical CVE-2009-4324 heuristic confirms the exploitation of a known vulnerability in Adobe Reader. The deobfuscated JavaScript files suggest the script's purpose is to download and execute a secondary payload. The presence of multiple JavaScript objects and stages points to a multi-stage attack chain.

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` `40589ac0587b05d306eb0b439c584e938d10557ced25ce3295d3771792718abb`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2650 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `02462152ff7c2a6f730f6b7769c2e748231c3ee2071709e76134c97e0a767e50`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC1E	11106 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `c27956372ce88ae83efee934781ba0ad442a616dc887a43753703947abe8e5ac`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x37B6	2242 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC1E	1081 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 0x37B6	165 bytes
`legacy_pdfkit_stage_002.js` `323c6ce3f5bdec0f0b1b46427d81d56be2a318650a0a004998082b9d17c39310`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC1E	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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