PDF malware analysis — malicious · d0de87045eb60b46

MALICIOUS

PDF

16.5 KB

MD5: 84103ba1470388096d1c968a1f0b22e2 SHA-1: 3b09cff979a0b0d25e9ad049734f2a109a5746c6 SHA-256: d0de87045eb60b46b8754264add6dd63e61fd5282ebb2018e3888916cd191557

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains multiple embedded JavaScript streams, with a critical heuristic firing for CVE-2009-4324 related to the media.newPlayer object. The JavaScript utilizes eval() and unescape() functions, indicating obfuscation to hide malicious code. The deobfuscated JavaScript suggests the intent is to download and execute a second-stage payload. The presence of multiple obfuscated JavaScript objects and the specific CVE exploit point to a downloader or exploit kit.

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` `312e9e61efe988006637be55dca187681b27b5faa9de3578cbd6fe3453e42e5e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2969 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` `a032b48b6131beb5926d7fe41b3cbf0e37b1847bf3917c6c949cd251c7740e74`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD5D	10821 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` `9dfa802a0d66358bf3ab65cca4830827c4d7e2c0431e33aae996cd82d6c58f5c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x37D8	2533 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` `263b1f0d04b975e8583bceb54a66b6e7b0017373be2ec2c0cc0be3dd02ad367a`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD5D	1083 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` `084615b15f20cdb5126a9286f3327d6268eaaf2749c518ba25b69876901d2aa4`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x37D8	171 bytes
`legacy_pdfkit_stage_002.js` `ca59dd0f9bf454cb29f22fc0149bfa41bb04e91fe9917f8d8a218748c65672b8`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD5D	1255 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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