Malicious PDF — malware analysis report

Static analysis result for SHA-256 55227b229a113d8a…

MALICIOUS

PDF

50.6 KB Created: 2009-09-16 10:55:28 +08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: 8950bbedf4a7f1d518e859f9800f9347 SHA-1: e4d30ecbe13765c4448e0b140db2569c58aa39f8 SHA-256: 55227b229a113d8a93d823466ebdd7a94c77fa37126b330818b41d49bd9a73de
178 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-4324 (media.newPlayer). This indicates the document is designed to exploit this vulnerability to execute arbitrary code. The embedded JavaScript, identified as 'javascript_obj0019_000.js', is likely responsible for downloading and executing a secondary payload, as suggested by the 'Pdf.Dropper.Agent-7212942-0' ClamAV detection. The presence of JavaScript actions and unescape calls further supports this malicious intent.

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. (matched in decompressed stream)
  • ClamAV: Pdf.Dropper.Agent-7212942-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7212942-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/pdfx/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0019_000.js
02921a777c88b2aef9284d9d24a367174ef196328fc1b313e898882bb6440b39		 pdf-javascript-stream PDF /JS object 19 at offset 0x50B 2597 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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