Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c6022fd9729a84…

MALICIOUS

PDF

3.3 KB
MD5: a49c14216b19a923a14626bdf45329a2 SHA-1: 0a2582aa1f7751d7486b37332812de430ac4ddda SHA-256: 11c6022fd9729a84e4c0c044bfee0207653b81dea7cd5fc83c015f144b8e28fc
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, flagged by multiple heuristics and a critical ClamAV detection (Pdf.Exploit.Agent-36121). The JavaScript appears to decode a string from the PDF's title metadata and then execute it. This suggests the sample is designed to exploit a client-side vulnerability within PDF viewers to achieve code execution, likely as a first stage for a more complex attack.

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
463ecb0dacc697aad7bbb5edd2ec79c44a6b01cf499b9264424a2fbf47663ae1		 pdf-javascript-stream PDF /JS object 7 at offset 0xA86 349 bytes

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