Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b097037371a758…

MALICIOUS

PDF

12.1 KB
MD5: 8199b1243494005b79a59a95f4a7f3df SHA-1: be84cac223f6b9c8f5101a01c204dabdee20038c SHA-256: 08b097037371a758333b3045de596c1afc4a322e59cf90bfd215a4198ed2284f
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded script payload and an embedded file, indicating it is designed to exploit vulnerabilities and download further malicious content. The presence of XFA form elements suggests a potential avenue for exploitation.

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
d6bdb20dcd7f5d4f354316d57eb6a86714c8fadb32e0c2f9ed4323f11d9e0c6a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11643 bytes