Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33c18b520379e39…

MALICIOUS

PDF

7.4 KB
MD5: 9f87e2def2795238044d9642f661975e SHA-1: 91cab427c56d2405e6fd78103238871b2e1e51a2 SHA-256: a33c18b520379e3914423719d3fceaaa95ce5818792ae1b202753ce4675abab4
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV also flagged this file as Heuristics.PDF.ObfuscatedNameObject, suggesting malicious intent. The JavaScript is likely responsible for executing a malicious payload, though its exact function cannot be determined due to obfuscation. The attack pattern involves luring the user into opening a malicious PDF that then executes embedded JavaScript.

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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