PDF malware analysis — malicious · 87d08649dc8465e7

MALICIOUS

PDF

18.2 KB

MD5: 232a98d9387ec5ed6ec465b5f2657539 SHA-1: 338c8dfcf5efa3ab66b9f56d27624ae60a2bf568 SHA-256: 87d08649dc8465e7f44ca18298d4b8ac5bf6be7a89d8a505a8f12270da3edff5

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicative of exploit code. The critical heuristic firing for CVE-2009-4324 confirms the exploitation of a known Adobe Reader vulnerability. The deobfuscated JavaScript likely attempts to download and execute a secondary payload, as suggested by the presence of multiple JavaScript streams and the nature of the exploit.

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` `cfc9c943869a92de356be8eb531d15d7598b6e6420760057e29b643c6e441500`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2917 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` `925acb0553b7d8ac2ab39f7692ef8ae1c894ac8e7ed964cfaf322603407ee0cf`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD29	12884 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` `216373b4f8155a7d00cd02165d1fa9ac88a505268a3598cdc87c56e6dd295819`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3FB3	2223 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` `6bc89bbc6a6b4818334a94b26ddc2b795f147cc0f16940d86d01bd46877009da`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD29	1090 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 0x3FB3	165 bytes
`legacy_pdfkit_stage_002.js` `7cfbe8bb825cd376ee53e3e6d62fdc410df1fd3f1497e6799b2c335e0881212a`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD29	1256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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