Malicious PDF — malware analysis report

Static analysis result for SHA-256 7525fe1cb41bec09…

MALICIOUS

PDF

3.3 KB
MD5: fbe122d346811dbc9853ebc7f3c007f9 SHA-1: 5eaa31b581459a33a2dfbc993688ff0ebf620e87 SHA-256: 7525fe1cb41bec09224b9b0d705edf99129c5a6af5c4ca79383a75b636315e1e
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 obfuscated. The script decodes a string from the PDF's title field, which appears to be a malicious payload. This payload is then executed, leading to the detection of Pdf.Exploit.Agent-36121. The primary attack vector is likely spearphishing attachment, with the PDF exploiting a client execution vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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
b790d4344ecb8e4249ddedb6b45e8ab397914e9ee6fdcb137642a8021d7f3741		 pdf-javascript-stream PDF /JS object 7 at offset 0xA87 355 bytes

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