There was an old discussion about advanced vocabulary lists in which the HSK vocabulary lists came up. I happen to have these the character lists for the new HSK are available at http://huamake.com/1to6Lists.htm . You can find links from there that lead to the actual vocabulary lists. I typed them in by hand, but performed a number of cross-checks for accuracy. The character lists for the old HSK are somewhat more extensive and are available at http://huamake.com/ABCDLists.htm . The combined vocabulary list for the old test is available at http://huamake.com/HSK_Vocabulary_List.html . There are some errors in this last list because I extracted the raw data from a pdf file and there are errors in the mapping table between Adobe's truetype font and UTF-8. I have fixed most of these in the character list, but not gotten around to fixing the original vocabulary list, yet. Basically, a few similar looking Japanese Kanji and some alternate forms of characters slipped into the mapping table. Anyway, the vocabulary list for the old HSK is divided into four levels of difficulty 乙, 丙,甲 and 丁, but it one list, which kind of fits with the testing style of the old HSK.
The highest level of the new HSK has a vocabulary list of 5000 words, and the old HSK has an 8822 word vocabulary list. As a test taker, the new test is less intimidating, in that regard, but it also lacks words for such things as dragonflys, spiders and uranium, which I think a native speaker would know.