Malicious PDF — malware analysis report

Static analysis result for SHA-256 0820e33d3a6c7f1b…

MALICIOUS

PDF

45.0 KB
MD5: b0e0427f9abbf1fe51c62ceb4731b9c0 SHA-1: e9d7f7de44a6a54db16be58ae3df6294708d9061 SHA-256: 0820e33d3a6c7f1b29f271a052b02d410b4191c06460395768535f7316717a11
176 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and triggers heuristics related to PDF JavaScript exploits and XFA forms. The JavaScript code appears to be obfuscated and likely attempts to download and execute a secondary payload, a common technique for malware delivery. The benign URLs present are likely decoys or related to the XFA form structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8877

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 0xA22E 3413 bytes

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