Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6559fe31931f569…

MALICIOUS

PDF

12.5 KB
MD5: 48d2b56931f344a6f3b633ce76432475 SHA-1: b4aa42beecf21e31d151a56ecc0507c7a0d9e487 SHA-256: f6559fe31931f569e727ec917a3c68cc86dfd740974e39726dd6e448bc411662
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. ClamAV detection of 'Pdf.Exploit.Pdfka-9' strongly suggests exploitation of a known PDF vulnerability. The embedded JavaScript is the likely mechanism for delivering a secondary malicious payload, such as a downloader or dropper.

Heuristics 3

  • 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
f429de26b2828350de3c31a24f2d776b6461bf6d66b858df31d118f9cd88957f		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11747 bytes
Detection
ClamAV: Pdf.Exploit.Pdfka-9
Obfuscation or payload: unlikely

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