Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f4dad9f71e994b…

MALICIOUS

PDF

19.1 KB
MD5: b6e9ba1ac185ba62216b8b46525212e4 SHA-1: 5097243bc73c2559d0b27430022602488f6ef79f SHA-256: 98f4dad9f71e994bdad9eb3529303a993bec6d404e55b3262ae8b0c02b6e1d2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). It contains an embedded script payload and an embedded file, indicating it's designed to deliver a secondary exploit or malware. The presence of XFA form elements and embedded URLs, though benign or unknown, are common in PDF-based attack vectors.

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
a7b7d58b4fdb0818a4023bc3f7119b34bf68e69c014eb2ea746d145a510cc6f0
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18838 bytes