Malicious PDF — malware analysis report

Static analysis result for SHA-256 defc7bcc32dd4d71…

MALICIOUS

PDF

1.5 KB
MD5: 7c94ac7fbcc0a1fc33a6db476d8a76d2 SHA-1: d9d7eb3989c2350954609e3fd1b05fd6cfa5036e SHA-256: defc7bcc32dd4d71c4ce8ff3193f6e857f71afca7ed5d4dde2d9ac417105c040
76 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and an embedded file, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_EMBEDDED heuristics. The ML classifier strongly suggests maliciousness. The embedded file 'xQetldvH.swf' is likely a payload or exploit component. The PDF_FILTER_HEX heuristic with exploit indicators further supports the exploitation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.