Malicious PDF — malware analysis report

Static analysis result for SHA-256 0014d3fe21333668…

MALICIOUS

PDF

44.9 KB
MD5: d14837d7daefe523b3f8671e43bbcd45 SHA-1: 1d5efbeca8bb2da4bff55ebdec7b7334aa0c4b5f SHA-256: 0014d3fe2133366870c5717fca43b4b6f725483842012b04abeeb4cb2194451e
176 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, flagged by multiple heuristics as an exploit cluster and obfuscated. The JavaScript code is heavily obfuscated and appears to be designed to download and execute a secondary payload, indicated by the presence of exploit-related signals and the ML classifier's high confidence in maliciousness. The specific URLs extracted are related to XFA forms, which are known to be targeted by exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

Heuristics 6

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • 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
b03234bed7d2aad6419472e3a75775fec7607c09d03e32895e419ab4db10e847		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F0 3413 bytes

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