How to extract blank pages into a merged PDF document

I'm developing a tool to extract all blank pages (for this tool, I regard pages without text as blank pages, although there may be other objects in them) or not OCRed pages to a merged PDF, also I want to insert a analysis result page to the first page of the merged PDF. The codes below can create an "Analysis Report" with the first page stating "Pages X,X,X,X... are blank pages.", but I don't know how to the extract the blank pages to the consecutive pages of the "Analysis Report", and how to insert bookmarks "Page X", "Page X" (X means the blank page number in the original document), I check the JS reference and find that there is a method "extractPages", but it can only extract a continuous page range. Can anyone kindly help me? Your help is really appreciated!
  
var blankpages = new Array();
for (var k = 1; k <= this.numPages; k++)
{
numWords = this.getPageNumWords(k-1);
if (numWords == 0)
{
blankpages.push(k);
}
}
 
var fileName = this.documentFileName;
if (blankpages.length != 0)
{
var rep = new Report();
rep.size = 1.6;
rep.color = color.blue;
rep.writeText("Pages " + blankpages + " are blank pages.");
rep.open("Analysis report of " + fileName);
app.execMenuItem("ShowHideBookmarks");
}
 
Here is an example file which I want to process:
http://g.zhubajie.com/urllink.php?id=11690845l9cnk3fqe5779ubz
 
Hers is the analysis report which I want to generate by JavaScript:
http://g.zhubajie.com/urllink.php?id=11690849jycqmypg87dmqm60