Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0634aa0c1cf1191…

MALICIOUS

PDF

12.5 KB
MD5: 7316b5388b9aaf6103b4bca83cca63bb SHA-1: 29b5f296bdb386dd4ccf14b8b9693cdbc7879c98 SHA-256: c0634aa0c1cf1191ada63032b978aa19ffdf64a7a7fd43e8759916c4b02d5cc8
116 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-94' and the 'PDF_METADATA_EVAL_STAGER' heuristic indicate that this PDF is designed to execute embedded JavaScript. This JavaScript is likely used as a stager to download and execute a secondary payload, a common technique for initial access. No specific family could be identified.

Heuristics 4

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER
    PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
aefb929a0bb1926125d66cd3d354437bcf98c311d83901471721768d96627ddd
pdf-javascript-stream PDF /JS object 76 at offset 0x2FE5 331 bytes