Malicious PDF — malware analysis report

Static analysis result for SHA-256 db41dc5e7a133dce…

MALICIOUS

PDF

138.5 KB Created: 2009-07-08 10:53:46 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 741405dec5bf1eff3224186775037df0 SHA-1: 97e7e652e1e2db2241b7b307ff6d05dca0184541 SHA-256: db41dc5e7a133dcec772849f9bbf48680410799fd87f2607e1aaeef996cf7d22
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability, specifically targeting the media.newPlayer functionality. This JavaScript is designed to be executed upon opening the PDF, likely to download and execute a second-stage payload. The presence of multiple JavaScript streams and a critical heuristic firing for this CVE strongly indicates a malicious intent to exploit the reader.

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
828ebb87163ecaf16d413e543f080da83ca41597d02b835da55542898af11cb3		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 3089 bytes
js_property_alias_stage_000.js
f2a1ec7e2a971c61cb902cce3430b1d8ff12153f0b7f9fc8b19c9798d5b57aff		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DA 2921 bytes

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