Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbba68309a18cbd…

MALICIOUS

PDF

46.0 KB
MD5: d2c838362e7d638b2a7db8d627a5f142 SHA-1: 5466fb9ba7a2e381605da98b6aafab0f05857ca6 SHA-256: cdbba68309a18cbd3ebc573f9b5c84a3261e076a4e131a937b1554b58c9d1991
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including critical ClamAV detection for obfuscated objects and a high ML score, indicating malicious intent. Embedded JavaScript, identified as 'javascript_obj0012_000.js', is present and likely responsible for the malicious behavior, such as downloading and executing further payloads. The presence of XFA forms and JavaScript actions further supports a complex, potentially exploit-driven delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9752

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
cae5e60dddecc81c27ab5e9c3a743fefa0cdb7d33d762721017890349aac1464
pdf-javascript-stream PDF /JS object 12 at offset 0xA329 4400 bytes