Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a50fa7588ebefd…

MALICIOUS

PDF

3.3 KB
MD5: d01540b97794dc4cc289f9cc36d9ffe7 SHA-1: f35968f68b0ea4d920d515d2cfcad986fcf67a33 SHA-256: 60a50fa7588ebefd93f288f45756c1ed80f5be81aa5fdb78eba621e9702f6132
106 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36121' and an ML classifier indicating high maliciousness. Embedded JavaScript was extracted, which attempts to decode and execute a string derived from the PDF's title metadata. This script likely serves to download and execute a second-stage payload, a common technique for PDF-based exploits.

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
1e368495154895bf14ff64166df54d4f8df29b67e13ca04b6d84e839c7d29b75		 pdf-javascript-stream PDF /JS object 7 at offset 0xA87 331 bytes

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