Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed46556f1af0f80…

MALICIOUS

PDF

32.1 KB
MD5: 59541f82970a2265a582bf62a823184b SHA-1: b87443d473f3bc93471a1a162dac8948cf2668c5 SHA-256: bed46556f1af0f803fcbdf48ff13eacf1df4e2a5c25429b764aef7b558762ead
186 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell Scripting: JavaScript T1559.002 Component Object Model Hijacking: Scripting Engine

The PDF file contains embedded JavaScript and a Flash object (jVtTngBkmcyI.swf), both of which are flagged as suspicious by static analysis. The ClamAV detection 'Pdf.Exploit.Agent-35955' strongly indicates a known exploit targeting PDF viewers. The embedded JavaScript is likely responsible for triggering the exploit and loading the Flash content, which is a common technique for delivering secondary payloads.

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
jVtTngBkmcyI.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1
pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x161F 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
5f6e1f4a61815cd0a2d661cd6819e43c0b37ee507d0907dc27b0502c3724f843
pdf-javascript-stream PDF /JS object 6 at offset 0x146 3910 bytes