Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9198151e34a6bf8…

MALICIOUS

PDF

12.3 KB
MD5: 55648f70625d4fdb733a0edc7e276db2 SHA-1: ecd8d3864f818f6d0eaf3512a914918b4e70884f SHA-256: f9198151e34a6bf8e71d5298ebc0f7bab8ebc7a2a68243cdfd0cbcf48cad4708
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. ClamAV detections confirm the malicious nature of the file, 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
18eae62c3669c7e06f2748dda0b9328103a68ef4d1e593c2bf21d52cd53eedf4
pdf-javascript-stream PDF /JS object 76 at offset 0x369 11523 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely