Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee8fa540e1b27ed…

MALICIOUS

PDF

45.0 KB
MD5: 315170a4ffbb0263d82970365740f315 SHA-1: 9f0678a1f4de29c2309cb246b31ab4e7381aa78b SHA-256: 2ee8fa540e1b27ed77b0c52ff1c7a5f1fdcdfb307e2589210abcb1893ca76241
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'. The ClamAV detection 'Pdf.Exploit.Agent-36128' strongly suggests this is a malicious PDF exploiting a known vulnerability. The large size of the embedded JavaScript streams further supports the likelihood of complex malicious code execution, such as downloading a second-stage payload.

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36128 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36128
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
420b687491ff17b30c0c5e291bd443c65aae8c95c4597843f868656fb5237b12		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
45e6f9a7cbaad21b9d239f13548631af5db40bc1d2350849db02b959225e4a6a		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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