Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3426e81358c9d1…

MALICIOUS

PDF

14.7 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 34aa3a84fb59be90b8ce834c7963591d SHA-1: bb98fb875171829b2b1a7e7df46164604b9d023d SHA-256: 7c3426e81358c9d159cdcec8395131ac8999b06f3ae539c268fbea17bef71374
168 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple engines, including a machine learning classifier and ClamAV, which identified it as Win.Trojan.Agent-36166. Embedded JavaScript was detected, indicating the file's likely intent to download and execute a secondary payload. The presence of JavaScript and the malicious verdict strongly suggest this PDF was delivered as a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36166
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
767bd409ce69b91c7d95f681459fd2ddeabb8ccd26dae4fa0b431488246a7f40		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75970 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.