Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a63841a23efc09…

MALICIOUS

PDF

46.4 KB Created: 2012-08-18 11:25:56 +04:00 Authoring application: Adobe Acrobat 7.0 (via Adobe Acrobat 7.0 Image Conversion Plug-in)
MD5: 9d23ae1c3fd92f64746f42940f5c4b53 SHA-1: 40b61c863f6bc306b3d9203e1cf2f27deb9cbf32 SHA-256: 83a63841a23efc097ba4bd86131da231ba5244c453e045b1fe2257ff802322a7
106 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent-7278169-0, indicating it functions as a dropper. Heuristics confirm the presence of embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the specific actions are not detailed in the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7278169-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7278169-0
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0106_000.js
5c0669ce849172f8f6ed267cbd2fb8a945ea143643c595e63f1b982ce205a782		 pdf-javascript-stream PDF /JS object 106 at offset 0xB3C0 3405 bytes

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