Malicious PDF — malware analysis report

Static analysis result for SHA-256 601af4bf19be42c4…

MALICIOUS

PDF

272.4 KB Created: 2009-07-08 10:53:46 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: a49bb6ef5a11469788f1f5bc1f49eb8c SHA-1: 8484b9a2eb9d1b203c0dea72bcdaaedcb29d7d3d SHA-256: 601af4bf19be42c43849ee6c25d87b2dd6260c387bbbb2bd212f6d2615c5b4c4
108 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that is obfuscated and exploits the CVE-2009-4324 vulnerability. The script's purpose is to execute arbitrary code, likely to download and run a secondary payload. The ML classifier strongly indicates maliciousness, and the specific CVE points to a known exploitation technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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)
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
356e7f7ed1b2f645d8ca4291102fe008b055fd37961d80aadbc5f6b47f84c5e2		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 3066 bytes
js_property_alias_stage_000.js
880ad4ae53b8e4870bbf460845146692cacfd8112e48efd05986e2d19d515a71		 deobfuscated-js JavaScript property alias normalized stage at offset 0x4DA 2886 bytes

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