Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c01659b4aa4c11d…

MALICIOUS

PDF

11.9 KB
MD5: f1010e5a36b502fc2b19a406b625a9fa SHA-1: f33459fbcfb89d1f0a585cb43d3f9634d64cddb5 SHA-256: 3c01659b4aa4c11da6ed1deb4d1e0fc2c79bbc8e06ec51e43b70845fc1a53eda
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML score. The presence of an embedded script payload and embedded file suggests the PDF is designed to exploit vulnerabilities and download a secondary payload. The embedded URLs, while mostly benign or unknown, are part of the PDF structure.

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
98471f55eb94fc50d85c9d4d9bf83a61256c1395d16f77102e3b97f71dd0ab7e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11396 bytes