While attempting to complete this quadrant contrasting/combining the meanings shown, I was unable to recognize a word that means, Falsely Harmful. There is no implied intentionality or morality here; false simply means not true, and harmful simply means not helpful/neutral. The determination of harmful and false is also not included in the word I'm looking for, so it could be understood, believed or unproven...it simply means, falsely harmful.
Examples for the word I'm looking for include: she chose not to go on the date because of the {word} information she believed, or he was not only mislead believing it was helpful, he was also fed {word} information too.
I went looking for options with the help of the Reverse Dictionary as shown here, and the closest I could come up with is calumniate, but that includes intentionality, and I'm looking for a more universal meaning. You can see from the list of words, there is not one listed which simply means, falsely harmful.
While misleading can apply to falsely helpful or harmful, I’m trying to distinguish between leading toward something helpful, and warning someone away from something harmful., If the word ‘miswarned’ existed, it would match the meaning, because the harm spoke or thought of was not true…there really was no danger. This applies to things like self-doubts that are not substantiated, and opting to do things out of fear, when the fears are either unfounded or simply don’t come to pass.