Is it permissible to upload a da'wah (Islamic proselytizing) clip to the internet with a misleading title and image that suggest it is pornographic, in order to attract viewers and benefit from advertisements, knowing that the content of the clip is da'wah?

A good end (promoting sermons and admonitions) does not justify an evil means (writing "pornographic film" and using a deceptive image), as both the end and the means must be lawful. This trick may repel beneficiaries from good content, and its harm is greater than its benefit, and it involves lying and spreading evil. Therefore, it is not permissible to use this method.