Malicious PDF — malware analysis report

Static analysis result for SHA-256 3414fa8661eba90e…

MALICIOUS

PDF

10.4 KB
MD5: a73e2528007154f156a3209be8855812 SHA-1: eb8377371422fb6c5d7dd87f730914920331da4b SHA-256: 3414fa8661eba90ebc247214b5c13172acc926489afbedef157d584efeaf31a6
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded object and triggers heuristics related to XFA forms and obfuscated objects, indicating it is designed to exploit vulnerabilities. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a secondary payload from the embedded artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
362ff33cd9ae15f412f5c2b5a3bac8d4d3d8f9966397076a3c07e28bad44fa4c		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x84 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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