Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafe847f3b0c2a22…

MALICIOUS

PDF

3.8 KB
MD5: b9c781ac3472c2900a4e0ed0459e11d8 SHA-1: 4d1c0a103c8f08e0cc6450e622c4fcb16706c640 SHA-256: aafe847f3b0c2a223bd9530874001c4e7176f3b5aab9c6316765daf404b25757
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF exhibits malformed structure, lacking a standard object graph, which is a strong indicator of an exploit attempt or evasion technique. Embedded JavaScript was detected, suggesting an attempt to execute malicious code. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Malformed PDF header with no object graph high PDF_MALFORMED_NO_OBJECT_GRAPH
    File starts with a PDF header but contains no indirect objects, xref table/stream, or startxref pointer. This is not a normal renderable PDF and can indicate parser fuzzing, evasion, or a corrupt exploit test case rather than benign content.
  • 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.