With neither side vulnerable at rubber, you are on lead against 3NT (1NT, 3NT bid).
I would refrain from doing the above with a Yarborough like
♠ 983
♡ 872
♢ 76432
♣ 85
Instead, I would lead one of the majors and hope to find partner's suit. Is this a good idea?
On the other hand, suppose I have
♠ J83
♡ Q72
♢ 76432
♣ K5
Would I still lead one of the majors because my suit and overall hand is too weak to lead fourth best from longest and strongest? (I have no probable and only two possible re-entries to my hand, and no high diamond. On the other hand, I have six high card points, nearly half of my partnership's total of 14 (assuming opponents bid 3NT with 26).
Note: In the actual example, the hand was
♠ J83
♡ Q72
♢ Q7632
♣ K5
and a lead of the 3 of diamonds worked well, but that's because the suit was headed by the Queen. Also, the extra two points means that I have 8 out of my partnership's presumed 14.