Pdf related are some examples of spiritual evils all the way back in Babylon (not a new thing).
Webms related are some current examples I found.
This video gives a good overview of evil spirits in our flesh:
https://www.youtube.com/watch?v=p5wbmiaib6o
tl;dw: We are in a spiritual war, we're given the armor of God for a reason, Jesus gives deliverance and safety.
Here are some passages (KJV) I think might be interesting (showing things like this in the time of Jesus):
Luke 10:
17 And the seventy returned again with joy, saying, Lord, even the devils are subject unto us through thy name.
18 And he said unto them, I beheld Satan as lightning fall from heaven.
19 Behold, I give unto you power to tread on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you.
20 Notwithstanding in this rejoice not, that the spirits are subject unto you; but rather rejoice, because your names are written in heaven.
<Jesus gives us power over them
Luke 11:
18 If Satan also be divided against himself, how shall his kingdom stand? because ye say that I cast out devils through Beelzebub.
19 And if I by Beelzebub cast out devils, by whom do your sons cast them out? therefore shall they be your judges.
20 But if I with the finger of God cast out devils, no doubt the kingdom of God is come upon you.
21 When a strong man armed keepeth his palace, his goods are in peace:
22 But when a stronger than he shall come upon him, and overcome him, he taketh from him all his armour wherein he trusted, and divideth his spoils.
23 He that is not with me is against me: and he that gathereth not with me scattereth.
24 When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest; and finding none, he saith, I will return unto my house whence I came out.
25 And when he cometh, he findeth it swept and garnished.
26 Then goeth he, and taketh to him seven other spirits more wicked than himself; and they enter in, and dwell there: and the last state of that man is worse than the first.
<Unclean spirits call places they dwell, "their house"
Mark 1:
23 And there was in their synagogue a man with an unclean spirit; and he cried out,
24 Saying, Let us alone; what have we to do with thee, thou Jesus of Nazareth? art thou come to destroy us? I know thee who thou art, the Holy One of God.
25 And Jesus rebuked him, saying, Hold thy peace, and come out of him.
26 And when the unclean spirit had torn him, and cried with a loud voice, he came out of him.
27 And they were all amazed, insomuch that they questioned among themselves, saying, What thing is this? what new doctrine is this? for with authority commandeth he even the unclean spirits, and they do obey him.
<Jesus made deliverance known in chapter 1
Matthew 7:
21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
<Important to mention
Jesus cast out devils and unclean spirits a lot. It's all through out the gospels (overthrew the tables of the money changers) and epistles (Armor of God, spirit of truth and spirit of error).
Hopefully this helps. :)