Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31cd84340b53caa…

MALICIOUS

PDF

99.0 KB Created: 2009-07-08 10:53:46 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 3b95f86a3aae6eeb4b932270e6393699 SHA-1: 13e2f7c39fa529852793f28319651f9796949e82 SHA-256: f31cd84340b53caab95726a647a1d7f26e6f353bee4600fad7ba30ff581d30f7
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2009_4324, specifically indicates the exploitation of a vulnerability related to media.newPlayer and JavaScript hex-escape properties. This suggests the script is designed to execute malicious code, likely downloading a secondary payload. No specific malware family could be confidently identified.

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
e09c11a234f64adaffab57715b8092ca8ba50bababda482d288dbb68b8e2db9b		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 3452 bytes
js_property_alias_stage_000.js
dd112bcd2655c65dd6910fb28dff51e4621c079e5f6f80d579991898267abe5c		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DA 3236 bytes

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