Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7d3939d5533ee7…

MALICIOUS

PDF

6.5 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)
MD5: f240eb4b4d9c3aa1b6f606e0461e3863 SHA-1: 9c1c370b808a8669ab86212385403b044ff281ce SHA-256: 1b7d3939d5533ee7c7eee74223a1439ecb4d805522aa90d61f2c21d6cfdc9c2c
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell Scripting: JavaScript

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as Pdf.Exploit.Agent-21017 further confirms its malicious nature. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF viewer to execute arbitrary code, as suggested by the ML_NYX_PDF_MALICIOUS classifier.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-21017 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-21017
  • 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_obj0006_000.js
09854b69f9871c0d1ca5fd444db369e883c6e8a91a345018533a10524edac832		 pdf-javascript-stream PDF /JS object 6 at offset 0x14A 500 bytes

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