Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1ffc2be883849c…

MALICIOUS

PDF

12.5 KB
MD5: 3e8ffb897d02dc2625ec5d4d94d0f488 SHA-1: 1a29da09e5fcc3ad42ab16e37d851ec5a6b9949e SHA-256: cf1ffc2be883849c88d250f96c38baa1b1255a8db2d32cc05c86bc3c60087c05
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. ClamAV detections confirm the malicious nature, identifying it as Pdf.Exploit.Agent-36365 and Pdf.Exploit.Agent-36364. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code.

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
5a325945aca91593239afcdd2b6f10ef9529d71aad98dc61c6de932d73c13b94		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11671 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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