Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89d12aebdc462af…

MALICIOUS

PDF

46.1 KB
MD5: f5c70a6ef2cb26fc257b1463b000878b SHA-1: 35baf0b610c2e42e06cae2baa61fde6d8fdc0d32 SHA-256: d89d12aebdc462af3d4e53b6bf0bbb6a4afbd6830e4715580aecbc8f8d981511
114 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. 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 initial access. The presence of XFA form elements (PDF_XFA) may be used to facilitate the execution of this script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

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/