Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fa770c1690a3b8…

MALICIOUS

PDF

42.8 KB
MD5: 9cb40b2e0e1f35843893e83fb758df92 SHA-1: 28dc40226143eaeda7dfc436c0a2f596388ffe2f SHA-256: 00fa770c1690a3b817f76fed6350db117202083092d7f01dd5e35e76edcf5275
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it is a malicious exploit. The presence of embedded script payloads and embedded files strongly suggests the PDF is designed to download and execute a second-stage payload. The ClamAV detection name 'Pdf.Exploit.Agent-36836' is included as a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • 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://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
5cf5c63aec970d32cde50ab966b8c9bb6012de0c63f4a4e1da6989060ab4dc87		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 691 bytes
embedded_file_obj0010.bin
e1ab66598406464785df1b7c3e4218452dce39c816aca3e1a181e312cbe8a05c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x460 93 bytes
embedded_file_obj0011.bin
4f4b1cef97a8ae9c9b637b35289d2d402b1f544967df426f7904f7cd0d3fca0b		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x508 524 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x75F 389 bytes
embedded_file_obj0014.bin
acc10bae3087af975aba238606ce703c8e38f9ebd061b69893c2de4df2a3ae46		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x931 40677 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA860 147 bytes

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