Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63e11b48ab4fe45…

MALICIOUS

PDF

12.3 KB
MD5: 7d31d12a1f7bdbd7026f6880b4de9050 SHA-1: 21e0399990b0ff5f6fa65fb1a59aad9bf9c19a61 SHA-256: d63e11b48ab4fe45b6ca7441056a4931493a3277ff478729742cf535776418b9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a large JavaScript object. ClamAV detections 'Pdf.Exploit.Agent-36365' and 'Pdf.Exploit.Agent-36364' strongly suggest this is a malicious PDF exploiting a known vulnerability. The embedded JavaScript is the likely mechanism for delivering a secondary-stage malware.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
6a1389c4651bfa3273ba81d978b64aca97ca7aa27537c3c8c27226aa5c5b91b0		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11507 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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