Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de75d895d9869e8…

MALICIOUS

PDF

79.1 KB
MD5: 162892582b49c16bfe8cd09cc387444e SHA-1: 721d53963f6e708c24c9c29b5dd05bc263eaea94 SHA-256: 7de75d895d9869e8eca2ecb9cd00f1ab17d9fe37419d3abcbe60fa7c68fd7290
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains an XFA form and an embedded script payload, as indicated by multiple high-severity heuristics and ClamAV detections. The ML classifier strongly suggests maliciousness. The embedded script, detected by ClamAV as Js.Exploit.HTML-29, likely attempts to exploit vulnerabilities or download a second-stage payload. The presence of XFA forms is a common vector for PDF-based exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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.
  • 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_pdf_script_0000023c.bin
9c9ab5c26b9395bdc16da5de7231ab87183ceb455b2737cf0a962e327da1a874		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80285 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

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