Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc1fe025bd3fb93…

MALICIOUS

PDF

3.5 KB
MD5: d0d5b3f568379174fecada4800407efc SHA-1: 44c3fedf38bd7dd23ccca1d136544b4dc5e2f1cb SHA-256: 5dc1fe025bd3fb936782bb0cd8e20811a004e98309a3836db91733ae9c77de4c
138 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains JavaScript actions and uses eval() to execute obfuscated code. This indicates an attempt to exploit a vulnerability within the PDF reader to achieve arbitrary code execution. The ML classifier strongly flags this as malicious. The specific JavaScript payload is heavily obfuscated, but the presence of eval() and exploit cluster heuristics strongly suggests it's designed to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.