Malicious PDF — malware analysis report

Static analysis result for SHA-256 7424a77094b9d76d…

MALICIOUS

PDF

45.7 KB
MD5: 4e1042c4192ea7f68cbc4702a6a05e9c SHA-1: 6f77212f646f739b2e3cc55d6d6937c474ca68d2 SHA-256: 7424a77094b9d76d0c873c0fb4e12aa4add571e1f528ab968cc3392ee900baf0
236 Risk Score

Malware Insights

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

This PDF file contains obfuscated JavaScript, flagged by multiple heuristics as malicious and an exploit cluster. The JavaScript is designed to be executed upon opening the document, likely initiating a download or further exploitation. The presence of XFA form elements and obfuscated name objects strongly suggests an exploit targeting PDF rendering engines.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9487

Heuristics 7

  • Hex-obfuscated scripting name object critical PDF_OBFUSCATED_NAME_OBJECT
    A PDF name object that drives script execution (/JavaScript or /JS) is written with #XX hex escapes to hide it from string-based scanners — e.g. /J#61v#61S#63r#69p#74 decoding to /JavaScript. Legitimate PDF producers always write these names literally; hex-encoding an executable name is a deliberate evasion used by exploit-kit and dropper PDFs.
  • 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
928e2ef8499a85e45830e4beac908c35f06dc411e682d8626cf44cf6dcabaaa2		 pdf-javascript-stream PDF /JS object 12 at offset 0xA21E 3999 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.