Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c6faaa6ca1ce93…

MALICIOUS

PDF

45.5 KB
MD5: 82379ccebff4313e487b32b35e119dd1 SHA-1: abf769efb21bd2ebaeea5170e367d802e21b853f SHA-256: 83c6faaa6ca1ce93800c60c8e90f7d314bb5cfd0cb41733aec8a0d330a27f28a
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

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. While the document body is heavily obfuscated and unreadable, the presence of JavaScript points towards an attack pattern involving script execution. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though its exact function cannot be determined due to obfuscation. The URLs extracted are related to XFA forms, which are often used in PDF exploits.

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
f984339d6ff3af533069e9fac149411a2136a4a7928fbb53882a1e656d4c6342		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D3 3899 bytes

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