Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30f33077221a5fd…

MALICIOUS

PDF

32.2 KB
MD5: fa8be223a504d7331f5a3d43a181ec8e SHA-1: 99fb97aef37d549acc4362e89911ceafbb9be7c8 SHA-256: b30f33077221a5fd390642bc5d5c2269d98ece5d1cd06244761ddd9d5bceec87
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and a RichMedia (Flash) object, both flagged as high-risk. ClamAV detection of 'Pdf.Exploit.Agent-35955' on both the PDF and an extracted artifact (rwMeSyzjCdOzc.swf) strongly indicates exploitation. The embedded JavaScript is likely responsible for loading the Flash object, which is a common technique for exploiting vulnerabilities and delivering secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
rwMeSyzjCdOzc.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x16D2 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
ead1680331f07b5505a1183037325aa29931a75149b0c8eb2a9a307a2b33fb18		 pdf-javascript-stream PDF /JS object 6 at offset 0x12E 4020 bytes

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