Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f673f3138be21d…

MALICIOUS

PDF

12.1 KB
MD5: 049293773e3e2e6b3d3698edc9c574d7 SHA-1: 22d2262b297b79b691b2e98cf9466a4e1d13ddfa SHA-256: 79f673f3138be21ddfdca118393a898463005cee91b334e093f2b6cdea8509f6
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript

The PDF file was flagged as malicious by both ClamAV and an ML classifier. Heuristics indicate the presence of obfuscated JavaScript within the document, which is a common technique for executing malicious payloads. The JavaScript action and embedded JS stream suggest an attempt to run arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

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