Malicious PDF — malware analysis report

Static analysis result for SHA-256 259f7f86c4fc50fb…

MALICIOUS

PDF

12.2 KB
MD5: 90aef1e3b58398b8a2f9459aca3f3e71 SHA-1: 69304c2cf453c303c386027c3dbca9d47624ece4 SHA-256: 259f7f86c4fc50fbd36ec2f20416c42ad19cb5eec308978d8f9006588f5c316b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file contains embedded script payloads and is flagged by ClamAV as Pdf.Exploit.Dropped-78, indicating it is designed to exploit vulnerabilities. The presence of embedded files and XFA forms further supports its malicious nature. The embedded script is too obfuscated to determine its exact function, but its presence alongside exploit indicators suggests it is used to download and execute a second-stage 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
fb22255ce8b68a6567bd15b3dab6aae43f8ebbcd0d8c20252718019a352ceac9
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11700 bytes