Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49039f397d77f6b…

MALICIOUS

PDF

44.8 KB
MD5: 3213bf7c97f69c4ec4f9bf529b349f0d SHA-1: be5ab0fcef7ec0869aedbf27ac38bb7bc493e30f SHA-256: d49039f397d77f6b9c67b80fcae9aee9f7a7425b89b617058aa0a848af5865eb
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 the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection for 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. The presence of XFA form elements also points to a complex document structure often used for exploitation.

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
272a5cc9aad59ff3caea5b37224ec3cd2b17c5e7a2e2a4eb5ac00aad252febba		 pdf-javascript-stream PDF /JS object 12 at offset 0xA222 3092 bytes

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