Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a69095067419622…

MALICIOUS

PDF

11.6 KB
MD5: 60df9678816965bf96d0acd8681bb21a SHA-1: 3b7e4fdc8b9cdbca6c25b7e8f06e835c0ed480d5 SHA-256: 5a6909506741962226b6983bdbf582f931f33bb0bbdb6e7978c23a375f88d1a5
118 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains an embedded file, likely a secondary payload, and leverages XFA forms, a common vector for PDF exploits. The embedded file 'embedded_file_obj0008.bin' is the primary IOC, suggesting the document's purpose is to deliver and execute this artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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 script payload in PDF stream low 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.
  • 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/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
ad2a52df9fda82b767b864782535e36913c8a37b3add111980c8859b8f59a1a3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11168 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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