Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adc2f634b3d9878…

MALICIOUS

PDF

12.1 KB
MD5: 5dde98750589add53bc890531afa693c SHA-1: e8f824b5486c15f60f3cb1618361b5a296f54bd7 SHA-256: 1adc2f634b3d987854f8da58eba51bb5df3636f1cc37f403dab9ffc7b1f89cee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it is a known PDF exploit. The presence of an embedded script payload and an embedded file further supports this, suggesting the document is designed to exploit a vulnerability and drop a secondary payload. The specific exploit or payload is not detailed in the provided evidence.

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
28441971c5a222551eceb5607f9a920060caf126cb7face7b5f44e63720c10ed
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11621 bytes