Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e9ae89d1630924…

MALICIOUS

PDF

1.17 MB Created: 2009-12-17 03:14:38 +08:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 7.0.5 (Windows))
MD5: 5a966cf902de37674e58ea8245add577 SHA-1: 3f8301035051584aee8e95542421a2ee37481374 SHA-256: d7e9ae89d163092494471abf89ee6fdc638f16f843fd00b8ef9be618cefe16a6
144 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability (media.newPlayer alias). This exploit is designed to execute arbitrary JavaScript, which is a common technique for downloading and executing further malicious content. The ClamAV detection further confirms its malicious nature. No specific family could be identified, but the exploit pattern is clear.

Heuristics 6

  • 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)
  • ClamAV: Pdf.Exploit.Agent-21305 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-21305
  • 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
  • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0031_000.js
2ff1e3c30f5871b957db720c187f3a8cae44f30696240e0b0cdab07921c79b36		 pdf-javascript-stream PDF /JS object 31 at offset 0x12B202 4849 bytes
js_property_alias_stage_000.js
5a140624a7afc077ad9ac86429654f790af021d37c6006d9fccde6f8cb2836e8		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x12B202 4648 bytes

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