No. While there are some Muslims in Brazil (~36,000), the dominant religion in Brazil is Catholicism. Additionally, the Brazilian Constitution of 1891 made Brazil a secular state with no official religion; it had previously been Catholicism.
Brazil does not have an official national religion. The major religion practiced in Brazil is Christianity, which is the religion claimed by 91 percent of the population. The largest denomination is Roman Catholic with 122 million adherents.