Statistical attacks on a list of MD5/SHA-1 hashes?
The comments sum it up perfectly…


  Poncho’s comment:
    None are known, and it would be a significant result, as you really do see hashes like that in practice...


and


  Maarten Bodewes’s comment:
    MD5 and SHA-1 have been broken for collision, but then the input should still be formatted in a specific way. More importantly for your question: there is still no chance of finding the input (without "guessing" it correctly); they are still one-way-functions.