Malicious PDF — malware analysis report

Static analysis result for SHA-256 8172d7e4eb24e6f9…

MALICIOUS

PDF

11.7 KB
MD5: 3f045b533c7d03ec7b5e8061ad0ae52a SHA-1: 543130e66853ae1e956f317fc5fa58efb7203912 SHA-256: 8172d7e4eb24e6f9a1403ea3ddb4bc79faf251d9a78977899c1c1ba723b4444b
96 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-78' strongly indicates this PDF is malicious and designed to exploit vulnerabilities. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF acts as a dropper for a secondary malicious component. The embedded URLs are related to XFA forms, which can sometimes be leveraged for exploits.

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
1d24dabe3b6fdfe36df252a401fd8a2801b8f1b106187e05df9aaca64b3a9297
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11188 bytes