Malicious PDF — malware analysis report

Static analysis result for SHA-256 406be4e3f4a19258…

MALICIOUS

PDF

44.8 KB
MD5: 7549b85d9b86ad9139d4a1aa6d5e726e SHA-1: b8ce8422a29a2e9da2409e47f6fface0cc8ed7f5 SHA-256: 406be4e3f4a192580af8b7fbdd696cec5ba8f96596bbff30d83440d4d7eb0607
84 Risk Score

Malware Insights

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

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 unreadable and the JavaScript is not provided, the presence of these indicators points to an attack pattern involving the exploitation of PDF vulnerabilities to run malicious code. The embedded URLs are related to XFA forms, which can be a vector for such attacks.

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 0xA228 3092 bytes

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