Trojan-dropper:JS/PdfDropper identifies specially-crafted PDF files that drop and execute a document file. The dropped document file in turn contains code that downloads and runs additional harmful programs.

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

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User Guide

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Contact Support

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

The PdfDropper file is usually distributed in spam email campaigns. Its appearance and content is usually designed to lure unsuspecting users into opening the file. The PDF file is specially crafted to contain and deliver a document file, which in turn has malicious macro code embedded in it.

Opening the PDF file causes JavaScript code included in it to run, which drops and opens the document file. This executes the embedded macro code, which contacts a remote server to download and run other harmful programs on the machine.

In previously analyzed samples, the downloaded programs include ransomware (Locky) and banking trojans (Dridex).