Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1912056e53a3ceb…

MALICIOUS

PDF

45.9 KB
MD5: 1529e12a7fa8aca8a2fb0b51ec72b7db SHA-1: 5e0c54a3dea9f52125df6d6566a03dd1bc82c342 SHA-256: e1912056e53a3ceb41c34f927b597fd3386f427614184a7f8c4a35e1f2aed673
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including PDF_JAVASCRIPT and PDF_JS, indicating the presence of embedded JavaScript. The ML classifier also assigned a high probability of maliciousness. While the document body is heavily obfuscated and unreadable, the presence of JavaScript suggests an attempt to execute malicious code, likely for downloading further payloads or exploiting vulnerabilities. The specific JavaScript stream (javascript_obj0012_000.js) was too obfuscated to determine its exact function, leading to a lower confidence in family attribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
a4e00d5ccf32ad949fa475e686e06d8433a3a699a6d2085a76d9d2642166391e		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1E2 4281 bytes

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