Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d582695fa5390d…

MALICIOUS

PDF

123.9 KB
MD5: 9fd5ee70a4bf670de25b795cde2a1c3d SHA-1: 53565aae6fef88c8d9948d0e341fce4b06949b04 SHA-256: 89d582695fa5390deaba14d6bfc7636e6f5ddf9eb3c2a1533bc1606f7dac052a
118 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics, including a critical ClamAV detection and an ML classifier. The presence of an embedded script payload within a PDF stream, coupled with the XFA form structure, indicates an attempt to exploit vulnerabilities or deliver malicious content. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000033a.bin
983be8cfb232479dcda4552759a94d9c3fb50f396cdec3a2900f2075f0d0e84a		 pdf-embedded-script PDF raw stream script payload at offset 0x33A 126109 bytes

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