Malicious PDF — malware analysis report

Static analysis result for SHA-256 841c3d7644b98b72…

MALICIOUS

PDF

161.1 KB
MD5: 79a356ead63c5f776955fd2b010dc633 SHA-1: e34e5ce13783cf91c5380357f45db99da6d584cd SHA-256: 841c3d7644b98b72c4a47af56aec2f6411db59a492a7053e96bf88ced2a46c54
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery. While specific URLs are present, their reputation is unknown or benign, and the primary malicious activity is inferred from the JavaScript execution.

Heuristics 5

  • 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
dee17595e76b7d8c18e2c7d5fe19da1b7fc07174ec72d3b65050172e56eb7eec
pdf-javascript-stream PDF /JS object 12 at offset 0x27855 6262 bytes