Malicious PDF — malware analysis report

Static analysis result for SHA-256 983ad254f6a20eb9…

MALICIOUS

PDF

9.7 KB
MD5: 3609a77c78caa40036c28ad0456ca4b7 SHA-1: 94db9d60552327eb3770f048e4fedb39b7ccb440 SHA-256: 983ad254f6a20eb946f7df172a31199935801cdd2f1a80cb7fc3424a1e502d5c
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell Script Execution: JavaScript

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-1828865 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828865
  • 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_obj0069_000.js
fa84d726c2de5ad4e1a73f3aaf13ac80749bcb6aeee4d771ac83549e68ea1e00		 pdf-javascript-stream PDF /JS object 69 at offset 0x1BE 18669 bytes

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