Weapon banes and extraordinary attributes

Quick question, if a (normal) weapon gives advantage to inflicting a bane then does the wielder need to use a physical attribute or can they use an extraordinary attribute which the bane allows? For example, could a character use influence to cast disarm and get advantage with a weapon like a longsword?

In general: No, you won’t get the advantage as you aren’t actually using the weapon to inflict the bane.

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Fair enough, thanks for the answer.