How to Open Excel File Embedded in a PDF? When working with Excel, it is best to open files in a single document and then drag & drop the newly created workbook onto the workbook with which you want to create the Excel link. This way, you will open the worksheet in Excel with the newly created workbook (in other words, without having to convert the file format). So how to open Excel file in a special form of PDF? To do this, you have to open your desired PDF document directly in your favorite application. The steps are: 1. Open the PDF directly. You can open this file with Microsoft Reader. 2. Select Edit > Preferences > Security (Enhanced) and uncheck the Allow Protected Mode at Startup checkbox under Sandbox Preventions pane. 3. Click Ok. 4. Open the desired application and open your favorite software. 5. Once you open your favorite software of your choice, choose a special type of file with which you're working at the time, then point to the special link on your preferred application, and the file that you have been working on will open in your desired application. What about PDF embedded in HTML files? As for PDF embedded in HTML documents, it appears that a PDF embedded in HTML works the same way as a file of the same format embedded in PDF. However, it is not advisable to try to open HTML based PDF attachments as it has not been tested out properly (and there is no information or guidance available regarding this issue at this time). More about PDF Embedded in HTML is coming.