Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b3700b3809f0c3…

MALICIOUS

PDF

140.4 KB
MD5: 0a886e7c09fd9c06fcf61acea6415776 SHA-1: 7f8a37b2ebee95123ed2d0f002e391ef4f79b01e SHA-256: 20b3700b3809f0c394c2dfcd68c2c5d23a299ddfe76e47165107f91d3e04302e
116 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm its malicious nature. The embedded JavaScript is likely responsible for executing malicious code, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6874

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