Hi @venkateshcheeni09 ,
There might possibly be a few repositories available as open source, we might be able to use that. If you have the python code already that does the Classification of documents, we will be able to integrate with Python as well using UiPath.Python.Activities Package.
For the downloading part, if it is to download from an application portal, UI Automation could be used to perform this.
Let us know your thoughts on the above.