Malicious PDF — malware analysis report

Static analysis result for SHA-256 23142c8afd399e37…

MALICIOUS

PDF

43.0 KB
MD5: 8957a1ab7aa3346135c7facc7e74543a SHA-1: 0bf44dee4c51a87b52cd27e0ceb51ab62bffa906 SHA-256: 23142c8afd399e37352ff1e62ead26bb3580c89e8039396b80be9d79619d75a3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830. Static analysis revealed embedded files and scripts within the PDF structure, indicating an attempt to deliver a secondary payload. The presence of XFA forms and embedded objects further supports the malicious nature of the document.

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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46 bytes
embedded_file_obj0009.bin
4e4aa857ade46b15fa57bbefcafcf5c87fc3fd227263eff9313cf2f373e0f878		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x13C 687 bytes
embedded_file_obj0010.bin
69650a61091a018036679a3439cc6a018b6a91ebe9e0e3a6b36ceb04d6491a4f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x436 160 bytes
embedded_file_obj0011.bin
112485b8b1834aa784d86b9d960bd1e60dea50673edf858e21d4cbd05c667351		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x521 454 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x732 190 bytes
embedded_file_obj0014.bin
5ddf4ed1e3d20d8d04c5c10226941993c8e3020e0ff6e15f6b24cde7f7073479		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x83D 41193 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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