Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b83fcf6d7d1ba89…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 08:26:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b281484bd0ff02b0d7aca55d3d4730b5 SHA-1: a70d0e42f8d366fb288ca8667fced3b2108a76ca SHA-256: 3b83fcf6d7d1ba89383389e4735739a29bec940f2bf9f1677deca43d111bc06a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The primary external URI found, http://netcdn.tw/app/479516143/minecraft-free-ios-2021-game-hack, is likely the destination for this lure, aiming to deliver a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-free-ios-2021-game-hack
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-glitch_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-do-you-get-the-hack-no-roblox_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master-2021_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/pokemon-go-free-coins-2021_GM1094591345.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/roblox-drivers-upgrade-download-free_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-free-school_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/claimrbx-free-robux_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-online-free-download_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-java-server-hosting-free_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-download_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://elearningmadrasah.min2madiun.sch.id/__statics/gudangsoal/files/tiktok-free-like-and-followers-apk_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b5.bin
46f3d749af764b094552d19c54cb4e80043683cd44014b4198b154139cfdbb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31B5 22168 bytes
font_01_sfnt_off00006233.bin
2bf844231399acc5cf711acb9faf8aedd609a9c8605d8b3f0076c20fc980fe80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 18400 bytes

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