Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68bcd6ac1a2dc0b…

MALICIOUS

PDF

14.3 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 9b73938857b60f12e19b6289f599df83 SHA-1: de5da00680ce6f2b903624469e5f43710552e449 SHA-256: d68bcd6ac1a2dc0b9b197f4984a12e57d8a1fc9581784d6ba406ad3e119f9eca
166 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection identifying it as 'Pdf.Dropper.Agent-7309591-0'. Additionally, an extracted artifact was also detected by ClamAV as 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, strongly suggests that the PDF is designed to execute malicious code, likely to download and run a secondary stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7309591-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7309591-0
  • 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_obj0007_000.js
8c213f4e0fe2d1d3b3e52ce7f795689c0531ceedae563baaa33c2b97e1ff720b		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74030 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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