Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b835855d9d49bc4…

MALICIOUS

PDF

33.3 KB
MD5: 7c117c2a12cfe1cee5d31e1da308334d SHA-1: 69a6ed5122a5634355c948860fcd93016ef655d9 SHA-256: 2b835855d9d49bc457297c74ae5d611e1508b838c11221a812b1348424308b96
186 Risk Score

Malware Insights

MITRE ATT&CK
T1559.002 Component Object Model Hijacking T1059.001 PowerShell

The PDF file contains embedded Flash content (LNwIZULikh.swf) and JavaScript, as indicated by the PDF_RICHMEDIA and PDF_JAVASCRIPT heuristics. ClamAV detections confirm the presence of malicious Flash content (Swf.Exploit.Kit-513) and obfuscated PDF objects. The embedded JavaScript stream likely facilitates the execution of the malicious Flash content, which is a common delivery mechanism for exploit kits.

Heuristics 7

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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
LNwIZULikh.swf
82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x16BC 27931 bytes
Detection
ClamAV: Swf.Exploit.Kit-513
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
8c0fc3e7bca34c99fe605b72a57172bfbfe6c047cc029bf1d3bf1955d5668ad4		 pdf-javascript-stream PDF /JS object 6 at offset 0x146 4083 bytes

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