Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05b39f1e4f0cfa2…

MALICIOUS

PDF

5.2 KB Created: 2009-08-23 19:47:07 Authoring application: Elza 2.6.6.3 (via PDF Library 4.8.1.5)
MD5: fbe02db153012cbb42c478e7d85be98f SHA-1: 523c4f3aceec15ea51a19058f4677ae2405dda0c SHA-256: b05b39f1e4f0cfa229e93aee5fcd72c6bbb3262c6950d85ea3484447e15df1ba
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Dropper.Agent-7293661-0'. It contains embedded JavaScript, which is a common technique for delivering malicious payloads. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7293661-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7293661-0
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0014_000.js
7bb56a16b206eafbc2d0141173659f9e0762bee4b44489fb38998aa6996da724		 pdf-javascript-stream PDF /JS object 14 at offset 0x398 87483 bytes

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