OUTFLAW: A Simple Engineering Blog

PDF documents can easily reveal the author name , date and time on which the document was created and PDF software used , which can be used to guess the identity of person , timezone and operating system and PDF software version used in computer.  I found a simple way to hide these basic information from PDF documents using Notepad++. STEP1:   Get the PDF document ,  make sure it is of PDF version 1.5 or below. For PDF 1.6 and above , we can just downgrade them using software like imagemagick by converting PDF to images and converting them back to PDF of version 1.5. STEP2: View the PDF metadata in a browser or exiftool and check information present before removal of  Metadata.   S TEP3: Search for Author, Creator, Creation date after opening PDF document in notepad++. STEP4: Remove lines containg words creater , date , etc as shown in the image above.   STEP5: Ensure that all lines which contained identifying metadata in plaintext are removed and save

  I found a simple way to modify C and C++ compiled executable programs without C or  C++ source code using notepad++. This method works well with Turbo C  and I have tested  this method with programs compiled with gcc5 ,gcc6 ,gcc7 and gcc8  and it works pretty good. The only limitation to this method is it does not work well with large binary programs. The C source code for the above C program used above is given below:- As shown in the above video after the C source code was compiled we get an executive file. In above case we got  new.exe . When we open new.exe file in notepad++  , we get gibberish text or unreadable characters. However some words are readable . I replace tails.boum.org to kali.org and M.Anish to kremlin in the program by editing it in notepad++  and I succeed  as shown in the video.  In this way anyone can modify a compiled program without source code. Statements in C source code inside printf( ) and System( ) functions are mostly reada