I would like to know if it is possible to export project analysis reports as excel or pdf from the below url
There is no project-level PDF or Excel export capability. You may take advantage of our web API to pull the data you want and transform it into the desired format. The web API is documented within the footer of your SonarQube instance.
you might be interested in this plugin
IMO it has great potential, but unfortunately the latest release has still errors and needs
to be polished.
see https://community.sonarsource.com/search?q=cnes for all related postings.