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It is impossible not because of brute-forcing a password is impossible but it is impossible because those wallets are fake.
From what I've seen in the year I've been active in the bitcoin community, all those wallets that are being sold on the internet are a manipulated wallet file to appear as if they hold the keys to those funded addresses. The scammers create these files to make money from selling them and they sell them to a lot of newbies.