Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde6e6c0bd3eb3cc…

MALICIOUS

PDF

12.7 KB
MD5: c9975248808adf71da643dabf6f37ad4 SHA-1: f59bbc781bc5aad597e07f2270d4b7b0493cc357 SHA-256: bde6e6c0bd3eb3cce2e4559f4a863aa92b36618491506d24f507b1a4c29f0da7
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, which identified it as 'Pdf.Exploit.Dropped-94'. Static analysis revealed embedded JavaScript within a PDF metadata stream, a common technique for executing malicious code. This JavaScript is likely used as a stager to download and execute a secondary payload, although the specific payload and download URL were not directly extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
70a59e9ff7d8213e013bcb37b870b48afb377b9a662fedb4765b123d7a8bf280
pdf-javascript-stream PDF /JS object 76 at offset 0x309B 331 bytes