Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b02bec1032965e…

MALICIOUS

PDF

32.2 KB
MD5: 855d5b60b6a39b022d802ae3ad3f135b SHA-1: a6b563b2e4c14174785b38aab1aa219815a5d1ca SHA-256: e5b02bec1032965ef93cfd3c8f8b5de4d117f5f5736bb975ebbd6b38416ee11a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.003 Phishing: Exploiting Trust T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript and RichMedia (Flash) content, as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. ClamAV detection confirms this as malicious (Pdf.Exploit.Agent-35955). The embedded Flash file 'HMueqHabBfPQyq.swf' and the JavaScript stream are the primary indicators of compromise, suggesting the PDF is designed to exploit vulnerabilities to deliver a secondary payload.

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
HMueqHabBfPQyq.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x16B9 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
2e560957466d7c5879cf360049a42d0304f9f9374071f908139083ca40f08889		 pdf-javascript-stream PDF /JS object 6 at offset 0x134 4051 bytes

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