Malicious PDF — malware analysis report

Static analysis result for SHA-256 250fcbd9f7eb653d…

MALICIOUS

PDF

42.3 KB
MD5: 434d868cbac9b06939fe4265718d8521 SHA-1: 7822b8e08adc78addd18e0a9a9ccb22d98edad72 SHA-256: 250fcbd9f7eb653d5b13bc188610183303ffe2662a9a31bfbd6e32488a34591b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF file contains embedded content and an embedded script payload, as indicated by multiple heuristic firings including critical ClamAV detections. The embedded script is likely responsible for executing the malicious payload. The presence of XFA forms and embedded files suggests a complex exploit chain designed to deliver malware.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
7bfc54063eee26a3317389035e4dabd733c004c75c4fa2dddcb5013c85e81979
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42538 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely