Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6058408bd8e60ff…

MALICIOUS

PDF

30.0 KB
MD5: 908e0c77873b3da2a0495a24b982fe94 SHA-1: 80fab9b871fe879fe22ad9a7945b9ebec648fe9a SHA-256: b6058408bd8e60ff1f12eb4ad66f71b939a92e404cfcb78197f94e39584d570d
226 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.002 Component Object Model

The PDF file contains embedded JavaScript and a Flash object, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The presence of an eval() call within the JavaScript suggests code execution. The ClamAV detection 'Pdf.Exploit.Agent-35955' further confirms its malicious nature. The embedded Flash object and JavaScript are likely used to download and execute a second-stage payload.

Heuristics 8

  • 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
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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
tleKRBPxrA.swf
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0xE0D 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
fd68068fbbbc793c59b5896fce59272a8f692c79019c37c8440fc33499a2b0f5		 pdf-javascript-stream PDF /JS object 6 at offset 0xEC 2549 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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