Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cbd43de84898bf…

MALICIOUS

PDF

11.0 KB
MD5: 0c1babbd0dad4045a2bd1b1e946485b8 SHA-1: 902f8e66be61c2b29e3179a18f56d852da5abc89 SHA-256: 70cbd43de84898bf1dc0a861eb5530a97866eb5ff8de73c9fe540bab1db963de
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, flagged by multiple heuristics and ClamAV as malicious. The JavaScript is obfuscated but is designed to download and execute a secondary payload, indicated by the 'Pdf.Dropper.Agent-7271461-0' detection name. This suggests a typical dropper or downloader pattern, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7271461-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7271461-0
  • 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_obj0044_000.js
ac1f17925208143e73c314a13c09faab2eb7e737c59416acbd28e5a7c28f78e6		 pdf-javascript-stream PDF /JS object 44 at offset 0x14C 29636 bytes

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