Malicious PDF — malware analysis report

Static analysis result for SHA-256 967fac27a59fdcf5…

MALICIOUS

PDF

45.6 KB
MD5: f6be635789a82058609a8e481990b8ba SHA-1: 181d2c254cdb76329d77707d6719990f7d6007bd SHA-256: 967fac27a59fdcf5920d6bd6874a34499bd5a539dab4db154893a8a3614f6a8b
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits multiple heuristic firings related to JavaScript and XFA forms, indicating a potentially malicious structure. The presence of embedded JavaScript, despite the document body being unreadable, suggests an attempt to execute code. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The embedded URLs are related to XFA specifications and Adobe, but their reputation is unknown or benign, providing no direct IOCs for malicious activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.1652

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
ff61fd080f540e288c7069c14724784bcc806fa6422d0cd9e3169afa4482d9f3		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F2 4102 bytes

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