Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c91f2deb3507ed…

MALICIOUS

PDF

19.3 KB
MD5: 53349b005e2a0ee909b974ce4b0d2e17 SHA-1: 78983ae737620a7adc3fc015d70fa470c4dead83 SHA-256: 00c91f2deb3507ed4705de00fb5908326f55f49dc6242467e25e7df05250a42d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML classifier score, indicating malicious intent. An embedded script payload was identified, suggesting the PDF is designed to exploit vulnerabilities and download or execute a secondary malicious file. The presence of XFA forms and embedded files further supports its role as a malicious document dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
f208fba67aa74dc19ecb17c29140984bfa590a5e2f2bb3cc12259d5d26552abd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19037 bytes

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