Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b12c616bcc0d532…

MALICIOUS

PDF

11.7 KB
MD5: 8a180eb9b875deed906c4d0baefc7dd9 SHA-1: 31ac86695f7794069c5f9da7da9008902d22fb31 SHA-256: 3b12c616bcc0d532dc7536e3605d6d6f8f678a5743e5b335a60abedbfd1c8bb0
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 this. The embedded URLs are benign or unknown, and the document body contains no user-readable content to indicate a specific lure. The primary indicator is the ClamAV detection name, which suggests a dropped exploit.

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
384779bf750976097f4f3f8557b7ab8dd9d4b521520d5e0c6f865acbdd3e4d25
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11208 bytes