PDF malware analysis — malicious · d1a9c4b1afa691f3

MALICIOUS

PDF

17.3 KB

MD5: 3eec5770738aa15ae9130860c53c2925 SHA-1: 7758dbe56bb436214a65e91fc92072adb6bdc378 SHA-256: d1a9c4b1afa691f35e6f3a50f10b43120589c9b449265d14fd9915890230d948

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The critical heuristic firing for CVE-2009-4324 points to a known exploit for Adobe Reader. The JavaScript is designed to decode and execute a payload, likely a downloader for further malicious activity. No specific family could be identified due to the generic nature of the exploit.

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` `61ecccb1ebec1162f220e467c9976c7a987b3606938dd4a9c4db6af6a9765a71`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3111 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_obj111712_001.js` `37c606d6ffc644a92125c3678096e88651ae3f2189aec977c06ee0739312278c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDEB	11289 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` `ff5579a50c5b6a38173e6701b33952a779b63e798e0a82d3d91b6e66f9e3fd3a`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3A3A	2705 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).
`legacy_pdfkit_stage_000.js` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDEB	1081 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` `15ff828311bfb8d33855aa47ed067fd0efbcc48689d92bf0ba917538690f57e3`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3A3A	171 bytes
`legacy_pdfkit_stage_002.js` `9e2cd6db2d183f30c7d11b359deb2bfa29aa144ea61e835e74bd492c80ed0ff9`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDEB	1253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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