Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d56e4de1ea45c1b…

MALICIOUS

PDF

141.6 KB
MD5: b3d07300f6e6f6a593f4fef7e8848a08 SHA-1: 7c90dad53b30a986ce22dd028007b4927ab0ded6 SHA-256: 9d56e4de1ea45c1b857b10f3a2a63aeeebcaa2855345d438d3d91b5abbdfe0ee
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model Hijacking

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. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to download and execute a secondary payload, although the exact functionality is obscured. The presence of XFA form elements also contributes to the attack surface.

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 0x22A49 5835 bytes

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