fix LIEF crash if scanning dos exe file

Author: noisecode3

CMakeLists.txt

@@ -25,8 +25,6 @@ find_package(Boost REQUIRED COMPONENTS system filesystem)
 
 find_package(OpenSSL REQUIRED)
 
-find_package(Python3 COMPONENTS Interpreter Development REQUIRED)
-
 if(NOT EXISTS "${CMAKE_SOURCE_DIR}/libs/miniz/CMakeLists.txt")
     message(STATUS "Submodule 'libs/miniz' not found. Updating submodules...")
     execute_process(
@@ -126,7 +124,6 @@ set(LINK_COMMON
     OpenSSL::SSL
     Boost::system
     Boost::filesystem
-    Python3::Python
 )
 
 set(LINK_GUI
@@ -136,7 +133,6 @@ set(LINK_GUI
 set(INCLUDE_DIR
     ${CURL_INCLUDE_DIR}
     ${Boost_INCLUDE_DIRS}
-    ${Python3_INCLUDE_DIRS}
     libs/miniz
     libs/LIEF/include
     src

src/binary.cpp

@@ -26,21 +26,28 @@ QString decideExe(const QDir& dir) {
     QStringList exeFiles = dir.entryList(filters, QDir::Files);
 
     for (const QString& file : exeFiles) {
+        QString path = dir.filePath(file);
+        std::string pathStr = path.toStdString();
+
+        if (!LIEF::PE::is_pe(pathStr))
+            continue;
+
         try {
             std::unique_ptr<LIEF::PE::Binary> binary =
-                LIEF::PE::Parser::parse(dir.filePath(file).toStdString());
+                LIEF::PE::Parser::parse(pathStr);
 
             bool found = std::any_of(binary->imports().begin(),
-                    binary->imports().end(), [](const LIEF::PE::Import& imp) {
-                return imp.name() == "DDRAW.dll" ||  imp.name() == "d3d11.dll";
-            });
+                binary->imports().end(), [](const LIEF::PE::Import& imp) {
+                    return imp.name() == "DDRAW.dll" ||
+                            imp.name() == "d3d11.dll";
+                });
 
             if (found) {
                 fileName = file;
                 break;
             }
         } catch (const std::exception& e) {
-            std::cerr << "Error: " << e.what() << std::endl;
+            std::cerr << "LIEF parse error: " << e.what() << std::endl;
         }
     }