Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d0e3bc3427d108…

MALICIOUS

PDF

58.8 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: a575ff65e580354e8ca5e91a490afbdc SHA-1: 2a3a32a85705669768dfddf7720305c611536520 SHA-256: 99d0e3bc3427d108572af64171d89f0d4aff7cbcc3de8a23f82d647d6ced1748
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Dropper.Agent-5441819-0' and a high ML score. The presence of embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests the file is designed to execute malicious code upon opening. The JavaScript object was too large to analyze for specific actions, but its presence in a malicious PDF strongly implies it's used for payload delivery or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-5441819-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-5441819-0
  • 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_obj0007_000.js
f8e1fd659ef92ba012e464b64ea14cc8bbd6307446d3391eb9b1943cac56287e		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 118565 bytes

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