Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d05e2efbd607b2…

MALICIOUS

PDF

427.3 KB Created: 2009-12-16 21:50:36 +08:00 Authoring application: PDF Editor - Foxit Software
MD5: befed7e6de83ab87c0ff67fc1727ddd3 SHA-1: e9eaaba276a97110b9db24b6b96b8f24f152468c SHA-256: 79d05e2efbd607b2e2de9aa481873b28332389f5890dfe4b75a9a6146f77ca7d
94 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers the CVE-2009-4324 vulnerability using the media.newPlayer object. This indicates the document is designed to exploit this known vulnerability to execute malicious code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured.

Heuristics 7

  • 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.
  • 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
4f590eab76e915b914e0ca555a9c5cc45d398f526b69829480e431f3e8b5a1a1		 pdf-javascript-stream PDF /JS object 17 at offset 0x457 2045 bytes

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