Malicious PDF — malware analysis report

Static analysis result for SHA-256 62385c375e9d8b20…

MALICIOUS

PDF

18.9 KB
MD5: 4dadc9e8e99edd0f53837e069fc50378 SHA-1: fe16c4aad2d03530648f55d533a3ae4dfc2334c5 SHA-256: 62385c375e9d8b20d39ee0d497519ab3e928eff5002184c338c12993f4162cf2
116 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV with the signature Pdf.Exploit.Dropped-78. It contains embedded script content and an embedded file, indicating it is likely designed to exploit vulnerabilities and execute a secondary payload. The presence of XFA form elements further suggests potential for exploitability.

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
c88b914fdd2d2d778cf6f7a8635c5ac2ba8c8fc2e68c5ae7b20879c08acd56f5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18592 bytes