Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2c01a85d972f09…

MALICIOUS

PDF

11.8 KB
MD5: 0c1acbe6d2a7f0ad58a76165b3bc74d7 SHA-1: 96946293f197534578a44ac69edd68b531bf50ac SHA-256: cf2c01a85d972f09e85c1055b65a5df341a4b3db78781c68f4e4ea4b774e4e0f
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with ClamAV specifically identifying it as 'Pdf.Exploit.Dropped-78'. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and drop further malware. The embedded URLs are confirmed benign or unknown, providing no direct IOCs.

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
84a61c9c2c62b25b0f14b9cfa4d5891eceac722485a92ab68f4702e23b8afb00
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11280 bytes