Genesis chapter 49 is the last words of Jacob to his sons. It prophesies what will happen to them in days to come (vv49:1).
After the Northern Kingdom was conquered by Assyria, the northern tribes disappeared, leaving the tribes of Judah, Benjamin, Simeon and some Levites in the south. The prophesy to Simeon and Levi (vv49:7) had already been realised as they dispersed among the tribe of Judah. The prophesy to Judah can be traced to the coming of the Messiah (vv49:10). As for the prophecy to Benjamin, will it extend to Paul?
Rashi comment on below, retrieved from sefaria.org
בנימן זאב יטרף means BENJAMIN IS A WOLF THAT TEARETH (i.e. “wolf” is not the object of the sentence but the word אשר must be supplied before יטרף). He prophesied that they (Benjamin’s descendants) will be “rapacious” in the time to come; thus the Benjamites were told (Judges 21:21) “and catch you every man his wife”, as you will find in the story of the concubine of Gibeah. Further he was prophesying concerning Saul (who was of this tribe) who vanquished his enemies on all sides, as it is said (1 Samuel 14:47) “So Saul took the kingdom… and fought on every side… against Moab… and against Edom… and whithersoever he turned himself he put them to the worse”.
בבקר יאכל עד IN THE MORNING HE EATETH HIS PREY — עד is an Aramaic word synonymous with the Hebrew words בזה and שלל, prey, which are rendered in the Targum by עדאה; and there is another example of its use in the Hebrew text of the Bible: (Isaiah 33:23) “Then is the prey of great spoil (עד שלל) divided”. He (Jacob) says this (“in the morning eateth his prey”) with reference to Saul who rose as Israel’s champion in the period when Israel began to flourish and shine (i.e. in the morning of his history; indeed some editions have “בקרן”, at the morning-dawn of Israel, instead of פריחתן) (Midrash Tanchuma, Vayechi 14).
ולערב יחלק שלל AND AT EVEN HE DIVIDETH THE SPOIL— even after the sun of Israel will have set through Nebuchadnezzar who will exile them to Babel, יחלק שלל HE WILL DIVIDE THE SPOIL, viz., Mordecai and Esther who will be of the tribe of Benjamin will divide the spoil of Haman, as it is said, (Ester 3:7) “Behold, I have given Esther the house of Haman” (Cf. Midrash Tanchuma, Vayechi 14). Onkelos translates it as having a reference to the portions which the priests received of the holy sacrifices in the Temple which was situated in the territory of Benjamin.
The interpretation of a prophecy is indeed subjective. I notice the prophecy of Benjamin has just three sentences (vv49:27), much shorter than Judah (vv49:8-12) and Joseph (vv49:22-26), who had once reigned the Southern and Northern Kingdom respectively. Therefore, I would doubt if this prophecy would end up in the Apostle Paul.
My observation is, the prophecy is more likely to talk about the characteristic of the Benjaminite, rather than on any specific person. It begins by calling the Benjaminite a ravenous wolf, which vividly describes their warlike character, consistent with the event of Gibeah (Judges 19-21), Saul who was the first king of Israel, Mordecai and Esther who save the nation from extinction, and Paul who fought the false teachers in the early church.
Therefore the prophecy to the Benjamite is not limited to a specific person, but rather to the tribe as a whole. This characteristic is neither good nor bad, it depends on whether one is walking with God. Paul and Esther are seen to have received blessings from God, but the event in Gibeah and the destiny of Saul were disasters.