Pdf.Dropper.Agent-6331533-0 — PDF malware analysis

Static analysis result for SHA-256 1582c9280eea074e…

MALICIOUS

PDF

809.3 KB
MD5: 3119abba449d16355ceb385fd778b525 SHA-1: e7cba013867d508b5322c483db20fa54bf5cc0f7 SHA-256: 1582c9280eea074ec938f0f923fbd4405cd40677e869afffa87b44b71855a941
176 Risk Score

Malware Insights

Pdf.Dropper.Agent-6331533-0 · confidence 95%

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

The critical heuristic 'PDF_JS_EXPLOIT_CLUSTER' combined with 'PDF_XFA' and 'ML_NYX_PDF_MALICIOUS' strongly indicates a malicious PDF exploiting embedded JavaScript. The ClamAV detection 'Pdf.Dropper.Agent-6331533-0' confirms this, suggesting the file acts as a dropper for further malicious activity. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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: Pdf.Dropper.Agent-6331533-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-6331533-0
  • 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/3.0/
    • http://www.xfa.org/schema/xfa-template/2.8/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off0006d90c.js
dcefc16710d335e69f60cdd8a0e174d43939d02eaa8dd4c6d7ce4ca63f06495b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6D90C 289498 bytes

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