Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a602b3325f2679b…

MALICIOUS

PDF

19.0 KB
MD5: 6160f6bf80a07e998a97f9266bc87832 SHA-1: 26f8c7ec5c4c1a6305d1942d0e86374b8e446184 SHA-256: 4a602b3325f2679ba76f5c9503f9bf1cdcf283d821045f8830a82e7b09f62077
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 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 download a secondary payload. 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
e34b724a9405a6f3862efc2a326e6738e64719611f6dc9beb2f2745487b96cd5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18729 bytes