Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef9654f1e28734…

MALICIOUS

PDF

11.0 KB
MD5: b5cda565d4c76d4a5e0ea0d6d4798321 SHA-1: b2a9e9b53eba355dc83e8f96cbe1cc61b606cb8b SHA-256: 62ef9654f1e28734f065dc1166e7ab40f5090e4ba89e671cc6b64788f9dd5865
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is designed to decode and execute a payload. The JavaScript function `dskp` reconstructs a string from hexadecimal-encoded values separated by '%'. This decoded string is then passed to the `eval` function, indicating it's intended to run arbitrary code. The ClamAV detection name 'Pdf.Exploit.Agent-36177' further confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36177 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36177
  • 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
a7e6203b0e8f812879ed8382ccbb3900ad81b5a92faf27692f51de6e8c96c13a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A6 569 bytes

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