Malicious PDF — malware analysis report

Static analysis result for SHA-256 88669a5d455d8481…

MALICIOUS

PDF

19.2 KB
MD5: f18a4e7b8a2222cf8d41a37074b8e041 SHA-1: 34599d3fb8efe3304db506689190efc738470023 SHA-256: 88669a5d455d8481b74fd49bf716faa1ffcef2a18c9fb252a6c38bc06fbbfdc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF

The file is identified as a malicious PDF by multiple high-confidence heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and an ML classifier with a score of 0.999996. The presence of an embedded script payload and an embedded file further indicates malicious intent. The PDF structure suggests it is designed to exploit vulnerabilities, likely leading to the download and execution of a second-stage payload.

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
a2e0bccd517221dd4a2831d8755ffe916ea32d093d4eb47fe1d2720e91184d6a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18893 bytes