PDF malware analysis — malicious · d445c6952f4d2d1b

MALICIOUS

PDF

13.8 KB

MD5: d3c9603a9a567c16fced874c732d4ecc SHA-1: 20d5784568942ee6de0ed454350a626f1d637f5f SHA-256: d445c6952f4d2d1bcb3f2b5bc876196b2d819c6c6101bcdebf929094f4241362

228 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: Malicious Attachment T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

This PDF file contains obfuscated JavaScript that exploits multiple Adobe Reader vulnerabilities, specifically CVE-2009-4324 (media.newPlayer) and CVE-2009-0927 (Collab.getIcon). The embedded JavaScript is designed to download and execute a secondary payload, indicated by the 'array_char_table_stage_000.js' artifact and the ML classifier's high confidence score. The primary attack vector is leveraging known vulnerabilities in older versions of Adobe Reader.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `3b4eb6cf4132d9d0f23c0d16122677057b589e2753b0d05cb89476636e98721e`	pdf-javascript-stream	PDF /JS object 76 at offset 0x38A	13042 bytes
`array_char_table_stage_000.js` `3635ce3d4a495b9dcc1ba7c03f6ba31653c2be2d262c647cbfb0d59269b27002`	deobfuscated-js	array character-table decoded JavaScript at offset 0x424	4469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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