Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a69d58e8ef94d3e…

MALICIOUS

PDF

44.8 KB
MD5: 7808ea511d3bcfd10ba787ca78e41fcc SHA-1: 29e5d5b037d54170f4671fcf8a67ae64015b2076 SHA-256: 0a69d58e8ef94d3ee94aa1b4286cc463d0eadcdce6bb6da1902222fa591d06c8
176 Risk Score

Malware Insights

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

The PDF file contains obfuscated JavaScript, flagged as a PDF JavaScript exploit cluster and detected by ClamAV. The JavaScript is designed to download and execute a second-stage payload, indicated by the exploit cluster heuristic and the presence of JavaScript code. While the URLs present are benign, the core functionality relies on the embedded script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9386

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
5ba8ccd3a939886e7857a55ef0126cb8d2e8ace919e7c9b9c394604344e2eac4		 pdf-javascript-stream PDF /JS object 12 at offset 0xA20A 3174 bytes

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