Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b0004c485dd324…

MALICIOUS

PDF

12.5 KB
MD5: 3ee60a1045a95d09ce8988143940d92f SHA-1: fccca87cd68d905923e1d13e9c43808491cf7ceb SHA-256: 51b0004c485dd324c53d0dba0becca3045db3afc3bf9f8508f87b68a987f9b4d
116 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-94' and the 'PDF_METADATA_EVAL_STAGER' heuristic indicate that this PDF contains embedded JavaScript designed to exploit a vulnerability. The embedded JavaScript stream, though not fully detailed, is the likely mechanism for executing malicious code, potentially downloading and running a second-stage payload. The PDF metadata also contains JavaScript, further supporting the exploit vector.

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
ecce353fb2e2797a753732bfa3cf56975bd3f5b3e87da66a106d13e4b55e2e26
pdf-javascript-stream PDF /JS object 76 at offset 0x3004 331 bytes