Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9d978d6caa581b…

MALICIOUS

PDF

11.6 KB
MD5: 8d3b1e0e0eb257e308b716380bda19ea SHA-1: b1c9b1fdb29b18d5927e21011d48a2558b40f098 SHA-256: 9f9d978d6caa581b1a32a5482fbc8d62125a6dc15b3e0d8dbb5fc2c6ea849f16
96 Risk Score

Malware Insights

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

The PDF contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it is designed to exploit vulnerabilities. The presence of XFA forms and embedded files further supports its malicious nature. The embedded URLs are not directly indicative of malicious activity but are part of the PDF structure.

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
6937fd173bd284137a9a3144a22ab7fa1e1260c647abfa67c5aa6859da6e54dd
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11145 bytes