Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad90f844a37bd42f…

MALICIOUS

PDF

45.4 KB
MD5: b051099dcd75e8e72aa3692583195b9b SHA-1: 60b1f9300498464a2a250b65f0f072b3e80b6d77 SHA-256: ad90f844a37bd42fab71b426d0bd8c965feb63ff4c4ecad921866ed1fddb3487
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by ClamAV with 'Heuristics.PDF.ObfuscatedNameObject', indicating malicious intent. Embedded JavaScript streams and XFA form elements were detected, suggesting the file is designed to execute code. The presence of embedded URLs, though currently classified as unknown or benign, warrants attention as they could be part of a delivery chain. The obfuscated nature of the JavaScript prevents a detailed analysis of its specific actions, but it is highly probable that it attempts to download and execute a secondary payload.

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
213dcbfea6a635d8e0a771920f5fc8c5ac3149c70f50e40e681e333e22ad76b5		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F3 3834 bytes

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