Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f045e3fccdb876…

MALICIOUS

PDF

3.8 KB
MD5: 77696a4aa554e09088a09702c182b8d9 SHA-1: 1ff3b1390a2e961f2ea8df489cc478c133a7bac0 SHA-256: b0f045e3fccdb876ff8dfcefeb386b00bc0d1001545b0f8e03f45b54ef59e9a1
112 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) commonly associated with obfuscation in malicious PDFs. ClamAV detection as 'Pdf.Exploit.Agent-36178' strongly indicates an exploit is present. The presence of JavaScript actions and streams points towards the execution of arbitrary code, likely to download and run a secondary payload.

Heuristics 6

  • 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