Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a06fc45694b1244…

MALICIOUS

PDF

10.5 KB
MD5: 78d0ad016005a98ab85ebcd6203b7bdd SHA-1: 3e1632a72b6638b7eb6bd25a02565c5faa819ff8 SHA-256: 6a06fc45694b1244464a06140dabdb760ba1ca21bfef45ed326712c6fa85fc4e
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including ML_NYX_PDF_MALICIOUS and ClamAV detection for obfuscated objects, indicating malicious intent. It also contains an embedded file, suggesting it's designed to drop a secondary payload. The presence of XFA forms and embedded files points towards exploitation techniques for client execution.

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
3e8c7bae767bd398d6c1898cc32d55befa736e653cbc2e79aef0bf7b215cc691		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x82 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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