PDF malware analysis — malicious · 9049f37b8b85aea6

MALICIOUS

PDF

15.1 KB

MD5: 4c6085c7924877999c402608a622ea33 SHA-1: 2a13f2cb6ef759bbd1a2b069d141a68b4a52f286 SHA-256: 9049f37b8b85aea671ca77fdbf80250ef4b222f71c0dd1f211a411a109977979

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript, identified by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and a critical CVE_2009_4324 alert. The JavaScript utilizes eval() and unescape() functions, common in exploit kits, to decode and execute malicious code. The presence of 'media.newPlayer' specifically points to the CVE-2009-4324 vulnerability. The deobfuscated JavaScript suggests the primary intent is to download and execute a secondary payload, although the exact URL or execution method is obscured.

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` `6cb29634c70e72dad76b2b180e93612871caafb9e4b18775c20b14b1562b96f5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2751 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` `c2693b5c7af496bc3d9b45080074225cab195990b1fd8b7df03308c8ff45ccc6`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC83	9470 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` `e0d6aea754c47b7d5928be7fda53c9f7d2349d93d5d6441b1813126ce99e573f`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x31B7	2610 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` `77e31ee392e03e0109a99a651a1f965cc21f4a579111db265d7fa458cb9d2899`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC83	1080 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` `8ccc5329441341ee9cb4fa780ae176fb6e995d86bca7b600cfdfc311d2436787`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x31B7	171 bytes
`legacy_pdfkit_stage_002.js` `c843a1cc401a7aa217ab1c31309480d99efeef1385282a54d7365854a2fae83d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC83	1252 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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