PDF malware analysis — malicious · 5975bae21199b020

MALICIOUS

PDF

17.8 KB

MD5: 7569cd29ff0bc283a805612b23d98d58 SHA-1: 91606359fe825268c4a6ff96c0a21134627c1f31 SHA-256: 5975bae21199b020d8cd623c3fa9074056c9a774e283d96fa778da16d2f04af8

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer sink. The JavaScript uses eval() and unescape() functions, indicating an attempt to hide malicious code. The deobfuscated scripts suggest the primary goal is to download and execute a second-stage payload. No specific family could be identified due to the generic nature of the exploit and obfuscation techniques.

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` `283e2da1710689a7616f1bde888a293a96d65cd2ad7a83dbbf3e6bd67715fbd8`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3182 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` `6dbc0149611f0e1a2834d3494f8ec749c983877c7eaf4f6eea2365af1eec6a66`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE32	12326 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).
`javascript_obj111713_002.js` `04290742a0eafa32c9130fba6dfaf26cdf3e02420b6ca7d146edcd8619e731b2`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3E8E	2154 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` `27920ea41782e3de7681655436ad162917290e5898d36303bc383088d7d66d85`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE32	1075 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` `56b7c437da156419b0bbe357c4bbae830b422407984bd48435a9a32f18f7c2e1`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3E8E	174 bytes
`legacy_pdfkit_stage_002.js` `f13b6f0222173f81d3bd6b0a0749a85beac6dc220db6704d3fff62c854a39c10`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE32	1250 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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