Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7a12a873728aa8…

MALICIOUS

PDF

12.1 KB
MD5: a50887bbc7c106253345df8159ea6f42 SHA-1: f1f2e2bb6e563a6bd508f7e074ad0f752bfabb19 SHA-256: 6a7a12a873728aa8e8bfbc4f58182486353b0240438cd7ffa516c7a1cb2cc479
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a malicious PDF identified by ClamAV as Pdf.Exploit.Dropped-78 and flagged by an ML classifier. It contains an embedded script payload and an embedded file, indicating it's designed to exploit vulnerabilities and download further malicious content. The embedded URLs, while benign, 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 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 script payload in PDF stream low 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 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
e3b68f48f511ea8f35f3c1f4796cf34a6d07d06aa253b41341943f47c7d0adad
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11625 bytes