Malicious PDF — malware analysis report

Static analysis result for SHA-256 093bb70ad739a9d9…

MALICIOUS

PDF

45.3 KB
MD5: 4be26ccc6436a4833606161f4e8b741b SHA-1: ec97136a64ad75069a840cda4a3c727e7ae064da SHA-256: 093bb70ad739a9d942667c5ffa9e58cfb3a26bf51f9dd48b44cf0b4e8904565e
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, identified as a PDF JavaScript exploit cluster targeting XFA forms. The JavaScript code is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The presence of XFA and JavaScript points to a common exploit delivery mechanism for PDFs.

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
e25d858688c5ea576bdde2f53718966c7afdf623a474de1e4a05815b18a3a3f4		 pdf-javascript-stream PDF /JS object 12 at offset 0xA200 3686 bytes

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