PDF malware analysis — malicious · b72ddafd59ec71ce

MALICIOUS

PDF

14.2 KB

MD5: 926714d601a422e26d60191975112f31 SHA-1: 82feb593e7e02cfab1ab3230d3bd7d57dcfa40df SHA-256: b72ddafd59ec71cead2020fff1172a442b45cd09ed6af9ddc1be96c054ed2211

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, triggered by the CVE-2009-4324 vulnerability via the media.newPlayer sink. The JavaScript utilizes eval() and unescape() functions, indicating an attempt to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files further supports this. The attack pattern is consistent with a PDF-based exploit kit delivering further malicious content.

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` `5085181991e82bb21ee8db12bc35605eb39727c38357ee58a891ce0cdcfb31dd`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3075 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` `34c9eb1e6c130851f8e78ecd5ce34b175086de9934210e3f8fa8ce0f9847bb21`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDC7	9021 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_obj111713_002.js` `6920d638990ac67eee9bb96016ca2ccf7f3f1b5f12c87ce88c5524ae042da012`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x313A	1833 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).
`legacy_pdfkit_stage_000.js` `f53476902dbb90ea98eef0b169821ff8356e8c515a6670f664c6913768e602a9`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDC7	1077 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` `fa44c3a6a5df9dd0c4918db03b8a33dc1e24bba8204a13d66510a81c2b2e6f17`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x313A	166 bytes
`legacy_pdfkit_stage_002.js` `40fd905ae18aac15a3c023e5b40288edca006bf58e378d905d5b3d5399a31678`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDC7	1244 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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