PDF malware analysis — malicious · 21610cc19aa9300c

MALICIOUS

PDF

6.1 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 97248138feeba2f65539d0701de5fed2 SHA-1: 5edb786cd0510ce0beab9dc521bc23a8289caab3 SHA-256: 21610cc19aa9300c49ea76015360564e71ef62869c6eb17094b97c14715d7a44

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious PDF T1059.001 Command and Scripting Interpreter: JavaScript

The sample is a PDF file that exploits multiple critical vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These exploits are designed to execute embedded JavaScript. The deobfuscated JavaScript files suggest a multi-stage download and execution process, typical of a dropper or initial access payload. The exact URLs or final payloads could not be reconstructed due to the obfuscation and nature of the exploits.

Heuristics 6

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)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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_obj0032_000.js` `e6bc87db015917ab03286186168c55f5779d35fad75de866a2703f39ceb57212`	pdf-javascript-stream	PDF /JS object 32 at offset 0x33E	268 bytes
`javascript_obj0034_001.js` `f0a7fe68f8d8ebe88621871827ecf9405f46b26bffd3804ea91c66711ebd6521`	pdf-javascript-stream	PDF /JS object 34 at offset 0x430	315 bytes
`javascript_obj0036_002.js` `6c59cc655084d112a6cc90a39736ca74b0c80b943dcebf5bbfa11bd1bf7e14b5`	pdf-javascript-stream	PDF /JS object 36 at offset 0xBC	218 bytes
`legacy_pdfkit_stage_000.js` `58e428137e7034683c38adcd5e62481706aed675b452db0650e5f8c4ed51d641`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x56C	1640 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `5f585e3d073227f2aaefc706e339dcc1347cd47b1f64f7493c91277251c10f33`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xB05	1806 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `771c5d2a9ff95552bf92388bf715f9acd0f4f8fb6dbae06452a8e11d3cff7bbe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1081	2950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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