Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d47d52abe65406…

MALICIOUS

PDF

11.7 KB
MD5: 2b809c549d88c42181f18bd44eae4942 SHA-1: 2663698f5efec4623bf94b10c1e64358262cd19c SHA-256: d2d47d52abe65406dae877c9b0dd57b4b02f54940a2aacb9338d5c00e3b6f9ad
128 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier with high confidence and also detected by ClamAV as Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it is designed to exploit vulnerabilities and download a second-stage payload. The embedded URLs are likely part of the exploit or delivery mechanism.

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
b6c21018f5ef916f788631143defecad2b686ef59a0d353efb2809a7b78dfb06
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11222 bytes