Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bb73d57b9c919e…

MALICIOUS

PDF

11.8 KB
MD5: 83821e2d749fba3bf4bb7a78bdec605b SHA-1: 9d50c8872743ecb391f77f1d8e815a8ed753f9e4 SHA-256: c8bb73d57b9c919ebaef87fd238713405ddccf2a13a4409e9988109faa1eb1aa
96 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports its malicious nature. The XFA form suggests a potential for exploiting form-related vulnerabilities. The exact attack vector and payload are not fully discernible from the provided evidence, leading to an 'unknown family' classification.

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
545bfcf590456f3c2fdd5c21db85ad87b645ceb6547e882a524a68a74f9b4726
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes