md5 Candidates.#1

[Chick3nman]

Hashcat doesn't go from 11111111 - 99999999, it does the full keyspace but in an order from most to least likely, based on Markov Chains created off of a human generated password corpus. If your hash was actually 8 digits, it would have cracked it in that attack, but it appears your hash is not just the MD5 of 8 digits.