Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed18a760598a6b4…

MALICIOUS

PDF

32.0 KB
MD5: 7f42dd0682e342256cb91e8d19c2fc36 SHA-1: 93cffc8d2d4ebbebf778b3a7dfeb082155f6f617 SHA-256: eed18a760598a6b43d2f09f849491032a4e17131b56ea50f05e7911c3ce5795b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash (SWF) file, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. ClamAV detection as 'Pdf.Exploit.Agent-35955' strongly suggests exploitation of a known PDF vulnerability. The embedded SWF file is the likely payload or exploit vector. The presence of JavaScript further supports the attack vector.

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
TCiCPaIB.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x15BB 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
579102f2441299b3e8f4419187bb6d93e452b5730ee10eff1c4bffe9d2970689		 pdf-javascript-stream PDF /JS object 6 at offset 0x142 3664 bytes

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