Hey Russell2, I've been looking into it and, apparently, Moroni (the original author of that book in the Book of Mormon but, in this case, as an angel when he appeared to Joseph Smith to teach him...) quoted from Malachi directly to Joseph Smith. (The Book of Mormon itself has no quotes from Malachi that I remember ever hearing or can now find...)


From LDS.org "What did Joseph Smith learn in his visits with Moroni? Moroni taught Joseph Smith from scripture, quoting Malachi, Isaiah, Joel, and Acts. John Taylor explained: "Joseph Smith in the first place was set apart by the Almighty according to the [councils] of the Gods in the eternal worlds, to introduce the principles of life among the people. . . . The principles which he had, placed him in communication with . . . Abraham, Isaac, Jacob, Noah, Adam, Seth, Enoch, and Jesus and the Father and the apostles that lived on this continent as well as those who lived on the Asiatic continent. . . . Why? Because he had to introduce a dispensation which was called the dispensation of the fulness of times, and it was known as such by the ancient servants of God" (Deseret News Weekly, June 9, 1880, 280).


I also looked up "cockatrice’s, dragons, satyrs, fiery flying serpents" in 2nd Nephi and that is all from where he is quoting from Isaiah... (Chs. 11 & 15, etc.) That's the hardest part to get through in the Book of Mormon.... It is mostly talking about the coming Millenial reign. Isaiah is a hard book to understand... very symbolic.