Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c963eebd911028…

MALICIOUS

PDF

32.3 KB
MD5: 8d1fc8d42b7308168b77483aa69e08fd SHA-1: 7a86f436479eb195c1fab7e246bbdf3a068a1ed7 SHA-256: 35c963eebd911028771914c553a0d2fc785715cb98ec414a2b6abe831582a362
184 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1559.002 Component Object Model Hijacking

The PDF file contains embedded JavaScript and a Flash object (SWF), indicated by heuristic firings for PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA. ClamAV detection as Pdf.Exploit.Agent-35955 confirms malicious intent. The embedded SWF file and JavaScript stream are the primary artifacts likely used to execute the exploit and deliver a secondary payload.

Heuristics 6

  • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
TqcGazpbjSE.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x172E 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: unlikely
javascript_obj0006_000.js
f071c921798140687a52c24dfdba29abfc311d5a17dcf34422302e5bc7f543a4		 pdf-javascript-stream PDF /JS object 6 at offset 0x14E 4071 bytes

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