Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2ef81280e71aad…

MALICIOUS

PDF

5.1 KB
MD5: 04a2e777a88885635f05cc3e183aed91 SHA-1: 574e6cb1f0730ad6a5e04b08da8f73de522da119 SHA-256: dc2ef81280e71aad3e66bdb42d913af555dab898ae4265975ce696d9bcd6609a
144 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of PDF-specific filters like ASCIIHexDecode and ASCII85Decode, combined with JavaScript actions and embedded JS streams, suggests an exploit designed to execute arbitrary code. The ClamAV detection name 'Pdf.Exploit.Agent-36178' further supports this, pointing to a known exploit pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-36178 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36178
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • 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.

Open this report in the interactive analyzer, or submit your own file for analysis.