PDF malware analysis — malicious · 2c1fa8f39ed76a4a

MALICIOUS

PDF

16.0 KB

MD5: 9dd25a2e0312f4fd494b562a7b573d9b SHA-1: 0bf7f2e0dab35699e5ded6ad96f41e4f19cc705d SHA-256: 2c1fa8f39ed76a4a41141e10b0b7431f9a2552469eaf8890f0f4e264dc21a5ed

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains obfuscated JavaScript, leveraging the CVE-2009-4324 vulnerability via the media.newPlayer sink. The JavaScript uses eval() and unescape() functions, indicating an attempt to download and execute a secondary payload. The obfuscation and exploit technique suggest a downloader or initial access stage of a broader attack.

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` `a15b4b30796b3df2857d7fad689ee0a9124df46776dc9653b4d1d11d0a6162dc`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2602 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` `1b9ebebd20874acfe5b41f6018ea06483aa65b52c5633486f58b5257b62e1b6a`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xBEE	10543 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` `17ac9dd40b78a9575151ff7216d9419ae6c93156d696eda15e7b65d2be30c996`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3553	2690 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` `9526a841366a560a33ecefc35d0a02acfd01ea4853436bfed8e7b6bd32831823`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xBEE	1074 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 0x3553	166 bytes
`legacy_pdfkit_stage_002.js` `44001165c25b4a9ce41bcad2158e7c7fb95f2ed97ad52cdd09330338bf91492f`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xBEE	1241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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