Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe078f3c5423a8e…

MALICIOUS

PDF

6.4 KB
MD5: 725f446929b5b4aa6c92b416ba9e5369 SHA-1: 7a812821b14a5222a0a8c5e60ee12dfb0969da54 SHA-256: ffe078f3c5423a8eaa5d37b2deeb6b0d5906e2e57af9c47126cf1b17de756d75
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. ClamAV detection as 'Pdf.Exploit.Agent-13975' strongly suggests a known exploit. The embedded JavaScript is likely responsible for triggering the exploit, leading to malicious code execution.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-13975 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-13975
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin
8617552ea22f48da70cc4c2fb07c01f89863ba1b641839d2fdbb743a4666f2f2		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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