Search files by words inside the document files with Django

APP: Legal APP (Shiny-Feather-27222)
We have a Django app where we are uploading files in the AWS S3 bucket.
We have a FileModel with FileField where we upload documents like Docx, PDF, and other text files.
We need to search the files which contain specific words inside the file.
How can I do it? Is it possible with SearchQuerySet API — Haystack 2.5.0 documentation ?