Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc1252388fcedf3…

MALICIOUS

PDF

427.3 KB Created: 2009-12-16 21:50:36 +08:00 Authoring application: PDF Editor - Foxit Software
MD5: 73c0e3db7e35b3541d838f529c77d602 SHA-1: fb45a2b117aa696c72ecd951eacad60166fc1b8a SHA-256: bfc1252388fcedf30f6f8cb44df64e240ee914711fff3a86b4fbda7df7b0cfed
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes String.fromCharCode and the media.newPlayer object, indicating exploitation of CVE-2009-4324. The JavaScript is likely responsible for downloading and executing a second-stage payload. The PDF itself is image-only, suggesting a lure to trick the user into interacting with the malicious content.

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.
  • String.fromCharCode medium PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically
  • 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
  • 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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