Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea42c55c4ea5c886…

MALICIOUS

PDF

151.1 KB
MD5: 5e3e1da26b514c38fd6aaa55a8a838ea SHA-1: c984da318eb21c29d63e9319e9875f3c6b630bf3 SHA-256: ea42c55c4ea5c8864fe67bf91821e56d6bef9ab19beeb29748d4127ea25c37cb
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript strongly implies an attempt to download and execute a secondary payload. The specific MITRE techniques T1059.001 and T1059.005 are relevant due to the common use of JavaScript within PDFs to trigger script execution, which can often involve PowerShell or Visual Basic.

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
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
c4ba3591c3074e8fbc2f51681f2267ae4d6650196a96437268cf3aa864f515e3		 pdf-javascript-stream PDF /JS object 12 at offset 0x25088 5835 bytes

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