Malicious PDF — malware analysis report

Static analysis result for SHA-256 809d87da1b98af95…

MALICIOUS

PDF

42.5 KB
MD5: 4ec568570eb1e0789053a3f858d0d348 SHA-1: 64df68831d790a72ac90d6b4178052e3fc2af7a1 SHA-256: 809d87da1b98af9540b0c3faae2a66680e37280d59bca3719f5a3ae9707bad73
156 Risk Score

Malware Insights

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

The PDF file contains embedded content and an embedded script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detection as Pdf.Exploit.Agent-36830 further confirms its malicious nature. The embedded URLs, while mostly benign or unknown, are part of the document's structure. The document body appears to be obfuscated script content, suggesting it's designed to execute malicious code.

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
17ca956f40362fbb6fcdd938c5923bbd8d5e3588e0cb1907ea10bf2e3c0fd185		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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