Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6d533a73bac55a…

MALICIOUS

PDF

12.2 KB
MD5: e9416ad01edb1cee1eec4759ab2115fe SHA-1: 6e1af6a65a01c73f0fedd9e2fbeee4829c0a3b92 SHA-256: ec6d533a73bac55a2bd49e924e23b11a4f63e9bb479f162f03a89bb61bcc403d
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). The presence of an embedded script payload and an embedded file suggests it is designed to exploit vulnerabilities and download a second-stage payload. The embedded URLs, while mostly benign or unknown, are part of the document's 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
df45601092cd93c739dd2d3592f55bc05298a9bb274247f745880a81e97c3178
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11693 bytes