Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0ac87b8a0fd741…

MALICIOUS

PDF

98.0 KB Created: 2009-07-08 10:53:46 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 77376346b428dc6c9244ad575a5eca87 SHA-1: 75b5be62f0a539ae735eda73a02ff7b3fdbc47d7 SHA-256: 4e0ac87b8a0fd741b69716002c28cc7747edf6eb60129f561e857356ed8697f6
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, which is triggered by the CVE-2009-4324 exploit. The heuristic indicates that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. This suggests the script is designed to download and execute a second-stage payload. The specific exploit used is CVE-2009-4324, targeting the media.newPlayer functionality.

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
f84736c2ad6b55a2cd19591a17b8698db9d6c8aa54560e0a6c7a7272c028dbc8		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DD 2948 bytes
js_property_alias_stage_000.js
a18b0afb2f5126a0ad6438c92249070b976ce22ec033f33f6a6c586b288e0e0c		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DD 2825 bytes

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