Malicious PDF — malware analysis report

Static analysis result for SHA-256 958bea5d35ebfa6f…

MALICIOUS

PDF

9.2 KB
MD5: 1dab26330f6d52fa3ef9061bf2c7eada SHA-1: 13edf3976c69fbfe05142011b15700f68c665754 SHA-256: 958bea5d35ebfa6f0d724035b3181b6ac92f247904f8d9515a270774d05c9ee7
114 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript that triggers the extraction and potential execution of an embedded PE file named 'WindowsAppNegativeControl.exe'. The ML classifier strongly indicates maliciousness. The embedded executable is the primary payload, likely intended to be run by the user.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
WindowsAppNegativeControl.exe
3cc719c03d7c548ae9bf771d105fc35a2e462d3d6180d756c3f2654b943a3958
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x39A 17920 bytes
javascript_obj0009_000.js
8b3bce096d0ff84a77c151f43bdb6c94fcc7180d260c8528a673edb8a27ccc3a
pdf-javascript-stream PDF /JS object 9 at offset 0x231F 78 bytes
javascript_obj0009_001.js
9366941fe572db65dc93f19ae2dbf9c48e639ade75aee4b6465195b982c68ae8
pdf-javascript-stream PDF /JS object 9 at offset 0x231F 76 bytes