Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc810c0ceee817f…

MALICIOUS

PDF

45.0 KB
MD5: 49be8f4f23a436de8742c43b54161064 SHA-1: c4ed026c47c4b9a0064f448bdf95796fc8eb7ff1 SHA-256: 8bc810c0ceee817f0221307289bff38ff421757aacf726962cd0f1a056b40dbc
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detection as 'Pdf.Exploit.Agent-36128' strongly suggests a known exploit is present. The large embedded JavaScript streams (45KB and 33KB) are likely responsible for the exploit execution, probably downloading and executing a secondary payload. The document body content is not indicative of a specific lure.

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
a004349b712269d6a65c6d7e8fd1fc9289fda495c5d04ccd6145baf3a0e612a8		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
49038a0c8c6eefc55337751901f74cfa1d17f696d21a61fae11185919c89fbac		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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