Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98e8211d6b2a9a4…

MALICIOUS

PDF

100.4 KB
MD5: a651d3c559a4d0a68f0f0348ab84b68a SHA-1: 87c0ae6a7e4000f944923d05c3c541dfdfea5da2 SHA-256: b98e8211d6b2a9a439266524d21db6b3af4efdad20541e880d0a67b8497076ad
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF T1566.002 Phishing: Spearphishing Attachment

The PDF utilizes XFA forms, a known vector for exploits. Static analysis detected an embedded script payload within a PDF stream, and ML classifiers and ClamAV strongly indicate malicious activity. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by the PDF structure.

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_00000246.bin
a05f7212aa6e909f5a225fa985f778c04b66982ec988d9049b2dd22d7838707d		 pdf-embedded-script PDF raw stream script payload at offset 0x246 102044 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.