Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2b1c9a840a05c8…

MALICIOUS

PDF

11.6 KB
MD5: 776b4163f39a79e39dd1cb6b05674a1c SHA-1: 7bb22b1532b002dd4bb2d2ad9a72977bee15e752 SHA-256: bb2b1c9a840a05c833bab4ed1fe60e946da7c91b26d0cd7d435ed8ac45056e62
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic strongly indicate this PDF contains an embedded exploit and script payload. The presence of XFA form elements and embedded files further supports its malicious nature. While specific script content is not detailed, the overall structure points to a delivery mechanism for a secondary malicious payload.

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
c98fc834a3c003895cfc54f70f09383d935e14637def76befd44fdff3abc9611
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11164 bytes