Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/C/r.java

@@ -0,0 +1,101 @@
+package C;
+
+import android.app.Notification;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.Shader;
+import android.os.Build;
+import androidx.core.graphics.drawable.IconCompat;
+import com.google.android.gms.maps.model.BitmapDescriptorFactory;
+
+/* loaded from: classes.dex */
+public final class r extends v {
+
+    /* renamed from: b, reason: collision with root package name */
+    public IconCompat f244b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public IconCompat f245c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public boolean f246d;
+
+    @Override // C.v
+    public final void a(A.j jVar) {
+        Bitmap bitmap;
+        Notification.BigPictureStyle bigContentTitle = new Notification.BigPictureStyle((Notification.Builder) jVar.f28b).setBigContentTitle(null);
+        IconCompat iconCompat = this.f244b;
+        Context context = (Context) jVar.f27a;
+        if (iconCompat != null) {
+            if (Build.VERSION.SDK_INT >= 31) {
+                q.a(bigContentTitle, H.c.c(iconCompat, context));
+            } else {
+                int i = iconCompat.f2784a;
+                if (i == -1) {
+                    i = H.e.c(iconCompat.f2785b);
+                }
+                if (i == 1) {
+                    IconCompat iconCompat2 = this.f244b;
+                    int i4 = iconCompat2.f2784a;
+                    if (i4 == -1) {
+                        Object obj = iconCompat2.f2785b;
+                        bitmap = obj instanceof Bitmap ? (Bitmap) obj : null;
+                    } else if (i4 == 1) {
+                        bitmap = (Bitmap) iconCompat2.f2785b;
+                    } else {
+                        if (i4 != 5) {
+                            throw new IllegalStateException("called getBitmap() on " + iconCompat2);
+                        }
+                        Bitmap bitmap2 = (Bitmap) iconCompat2.f2785b;
+                        int min = (int) (Math.min(bitmap2.getWidth(), bitmap2.getHeight()) * 0.6666667f);
+                        Bitmap createBitmap = Bitmap.createBitmap(min, min, Bitmap.Config.ARGB_8888);
+                        Canvas canvas = new Canvas(createBitmap);
+                        Paint paint = new Paint(3);
+                        float f2 = min;
+                        float f4 = 0.5f * f2;
+                        float f5 = 0.9166667f * f4;
+                        float f6 = 0.010416667f * f2;
+                        paint.setColor(0);
+                        paint.setShadowLayer(f6, BitmapDescriptorFactory.HUE_RED, f2 * 0.020833334f, 1023410176);
+                        canvas.drawCircle(f4, f4, f5, paint);
+                        paint.setShadowLayer(f6, BitmapDescriptorFactory.HUE_RED, BitmapDescriptorFactory.HUE_RED, 503316480);
+                        canvas.drawCircle(f4, f4, f5, paint);
+                        paint.clearShadowLayer();
+                        paint.setColor(-16777216);
+                        Shader.TileMode tileMode = Shader.TileMode.CLAMP;
+                        BitmapShader bitmapShader = new BitmapShader(bitmap2, tileMode, tileMode);
+                        Matrix matrix = new Matrix();
+                        matrix.setTranslate((-(bitmap2.getWidth() - min)) / 2.0f, (-(bitmap2.getHeight() - min)) / 2.0f);
+                        bitmapShader.setLocalMatrix(matrix);
+                        paint.setShader(bitmapShader);
+                        canvas.drawCircle(f4, f4, f5, paint);
+                        canvas.setBitmap(null);
+                        bitmap = createBitmap;
+                    }
+                    bigContentTitle = bigContentTitle.bigPicture(bitmap);
+                }
+            }
+        }
+        if (this.f246d) {
+            IconCompat iconCompat3 = this.f245c;
+            if (iconCompat3 == null) {
+                bigContentTitle.bigLargeIcon((Bitmap) null);
+            } else {
+                p.a(bigContentTitle, H.c.c(iconCompat3, context));
+            }
+        }
+        if (Build.VERSION.SDK_INT >= 31) {
+            q.c(bigContentTitle, false);
+            q.b(bigContentTitle, null);
+        }
+    }
+
+    @Override // C.v
+    public final String d() {
+        return "androidx.core.app.NotificationCompat$BigPictureStyle";
+    }
+}