Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00d796962eb1a0a…

MALICIOUS

PDF

42.6 KB
MD5: cba0a958eee8052146374a622fd1d0c3 SHA-1: 80c414443ef84c739ca880b8b0a5d0f4a2cee226 SHA-256: a00d796962eb1a0ad03a207afe546d7e2a22e5a9c71d1925ca9476f7e5b15903
186 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Agent-36830'. It contains embedded files and an embedded script payload, indicating it's designed to exploit PDF vulnerabilities. The primary IOC is the ClamAV detection signature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 0xD7 46 bytes
embedded_file_obj0009.bin
6de50b115f5e62a8a22b34c2515bd4f30a19c2001f722b7b81903b9cf1d67354		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 687 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x447 168 bytes
embedded_file_obj0011.bin
bfa551019f4fdeaace632c85287c10738ac2e4b71902f13ad812d3205b3c917f		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x53A 436 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x739 190 bytes
embedded_file_obj0014.bin
110a9d92e41b516a03538cb08b5711e819a4423ad1387559655d02f38ee64b32		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x844 40776 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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