Malicious PDF / .TXT — malware analysis report

Static analysis result for SHA-256 b491b04b4ac13423…

MALICIOUS

PDF / .TXT

9.8 KB
MD5: d3e2116a31fae040c4c03a0cf6c747ab SHA-1: 1eb4985c6ad288183e700c8e48589042ac02cdf6 SHA-256: b491b04b4ac134237a326170985e9fd65de42ad121a5cbc2a3b3ab66a0c33f24
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV also flagged it as Heuristics.PDF.ObfuscatedNameObject. The exact nature of the JavaScript payload is unclear due to obfuscation, but it is likely designed to download and execute a secondary payload. The differential parser failure suggests a deliberate attempt to hinder analysis.

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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