Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf76d336a7500df…

MALICIOUS

PDF

31.8 KB
MD5: d9196fa30e895ac93641bab334846cea SHA-1: d4cf23041f79e06fee4a748388ebea98ce2d6281 SHA-256: 9cf76d336a7500df1cecba04f037d53afaf0064100a310319696e1065032c4a4
216 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicating an exploit attempt. ClamAV detection as 'Pdf.Exploit.Agent-35955' and ML classification further support its malicious nature. The embedded Flash file 'IzVQkOnxmcU.swf' and the JavaScript stream 'javascript_obj0006_000.js' are the primary indicators of the exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
IzVQkOnxmcU.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x1545 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
5e10c0ca81746d7a999fde620a0ff9b19001c0e2a1d4cc9816b855bc1f045060		 pdf-javascript-stream PDF /JS object 6 at offset 0x14E 3712 bytes

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