Malicious PDF — malware analysis report

Static analysis result for SHA-256 01caafd636a3309d…

MALICIOUS

PDF

45.1 KB
MD5: e78e8d8c2f5adc99d5a83ad6c4db4fb0 SHA-1: 9b4119962fd3827ea133451d5a4102b2823816a3 SHA-256: 01caafd636a3309d8a6de9256a539e973a2d531f83900df75ed9c4c29daf1ae7
176 Risk Score

Malware Insights

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

The PDF sample contains embedded JavaScript and triggers heuristics related to PDF JavaScript exploits, including XFA forms. The JavaScript code is heavily obfuscated but appears to be designed to download and execute a secondary payload, indicating a malicious intent. The benign URLs extracted are likely decoys or standard references within PDF structures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
45681f5407771ff564d1891848d6eca382305930431c87cedb22c8a4663cfd84		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1ED 3567 bytes

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