Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ecef17ca0d9ff4…

MALICIOUS

PDF

33.2 KB
MD5: 8ba0fb4da1cfac455c5890f3c9ab5909 SHA-1: 92e8704def2197f838547cbd8fac57d336fdccff SHA-256: 60ecef17ca0d9ff451344134c5f2986ac57d69037934c590f22c9636f848e110
216 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA, indicating the presence of executable code and a Flash object. ClamAV detected the file as 'Heuristics.PDF.ObfuscatedNameObject', and an extracted artifact, 'FzIYZkTjvhdaEq.swf', was also flagged by ClamAV as 'Swf.Exploit.Kit-513'. The embedded JavaScript stream likely facilitates the execution of the embedded Flash content, which is a common vector for exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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
FzIYZkTjvhdaEq.swf
82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x1616 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
20283e26e93729b132162ce28fc641dd5cfbb57254ac6c3c7813aa19a5297aaf		 pdf-javascript-stream PDF /JS object 6 at offset 0x136 3919 bytes

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