Lydgate was not at all sure that the Vicar maligned himself.
And this cruel outward accuser was there in the shape of a wife—nay, of a young bride, who, instead of observing his abundant pen-scratches and amplitude of paper with the uncritical awe of an elegant-minded canary-bird, seemed to present herself as a spy watching everything with a malign power of inference.
There are no more uses of "malign" in the book.
Show samples from other sources
I glared at her—the woman had maligned me—and then I noticed for the first time the swell in her belly and realized she was pregnant again.
Gillian Flynn -- Gone Girl
But to malign the good name of America’s greatest television judge—that’s below the belt."