Malicious PDF / .HTM — malware analysis report

Static analysis result for SHA-256 0abece767704bf5f…

MALICIOUS

PDF / .HTM

45.6 KB
MD5: d39abd771f230b9e90970c0f00bfe69d SHA-1: 21311ab7039a8973a4a6e462a97c7ec746931fd5 SHA-256: 0abece767704bf5f10f15cbfb45e18b330ef6c2dc0836392f9504a011e443ce2
176 Risk Score

Malware Insights

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

The sample is a PDF file that contains obfuscated JavaScript, identified as a PDF JavaScript exploit cluster. The JavaScript is designed to exploit a vulnerability within the PDF reader, likely to download and execute a secondary payload. The presence of XFA forms and JavaScript actions strongly suggests an exploit targeting PDF rendering capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9671

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
9d02a59677d579f67ed68d968cea7206d3150af6a438b095d7ce426e1e3348cc		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FA 4009 bytes

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