Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9acfb79229c6bca…

MALICIOUS

PDF

5.2 KB
MD5: 5457048f9617cd5f4ec9ba6f3ab4d3d6 SHA-1: e921fcb2e548e05d5235ad3b8e063b25dcb8d8f4 SHA-256: e9acfb79229c6bcacfa1af7db6a85e46ad412fd1e0c3c792baf4b8bfca47c153
114 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and utilizes various decoding filters (ASCIIHexDecode, ASCII85Decode) often associated with exploit delivery. ClamAV detection as 'Pdf.Exploit.Agent-36178' strongly indicates malicious intent. The presence of JavaScript actions and embedded JS streams suggests the file attempts to execute code, likely to download and run a secondary payload.

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.