Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2ccfd266dc5363…

MALICIOUS

PDF

45.1 KB
MD5: 989b9d63da61d35423dcf74328fd9aaf SHA-1: c418968e648a7eae4c4eb8cd6e77e1532753b4b9 SHA-256: bb2ccfd266dc5363689dd57c54c32b129cbfdef221b6140885a27a1e190ee11d
114 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV with the signature Heuristics.PDF.ObfuscatedNameObject. It contains embedded JavaScript, indicating an attempt to execute code. The presence of JavaScript actions and streams strongly suggests the script is designed to download and execute a second-stage payload. While the document body is heavily obfuscated and unreadable, the technical indicators point to a typical malicious PDF delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9595

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
cea252e3d95bbd6b4ebf3900c737141a9851f7ae940285079ecf0c9a191fa548
pdf-javascript-stream PDF /JS object 12 at offset 0xA21C 3522 bytes