Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd11b2a44f66047…

MALICIOUS

PDF

45.4 KB
MD5: d71e2f05616291598584062f924dc860 SHA-1: 845a2b439b06e146cb09c298d8972bcd88f8bf61 SHA-256: 8fd11b2a44f6604776154611bd0225718d4a7f438282da71f2be0b28f70d2f61
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection for obfuscated content. Embedded JavaScript streams were identified, suggesting an attempt to execute malicious code. The presence of JavaScript actions and embedded JS streams indicates the file's primary function is likely to leverage these for exploitation or payload delivery. The ML classifier's high confidence score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
b32a56f89cbef54f187c413f89a744efd7b7beba2aed94a816ed8b3ebd9805a3
pdf-javascript-stream PDF /JS object 12 at offset 0xA1F0 3804 bytes