Malicious PDF — malware analysis report

Static analysis result for SHA-256 4680564153b83519…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 05:40:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: acbd5cc5783bd15a63aeb9deaa23db6d SHA-1: 77de9abb938181da894b0a408476f3d27a1863be SHA-256: 4680564153b835190ea0f0a1a0b7d6a0aba4fe86c6d1ee2d6eec4b939ec02cb0
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 the document. It also contains an embedded URI pointing to a URL associated with 'hacks for unlimited Robux', suggesting a scam or phishing attempt. The document's primary function appears to be directing users to external malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/hacks-for-unlimited-robux-no-verification-game-hack
    • https://www.unicor.co.th/assets/editoruploads/files/hack-de-coin-master_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-a-roblox-password-with-cheat-engine_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-minecraft-texture-packs_GM479516143.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-minecraft-account-reddit_GM479516143.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/114-hacks_GM479516143.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-things-on-roblox_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-villages_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/25-free-spins-coin-master_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-coin-master_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-apk-hacked-3526_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-promo-codes_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-games-on-roblox_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-script_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-tiradas-gratis_GM406889139.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-roblox-pin-codes_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • https://www.unicor.co.th/assets/editoruploads/files/hack-free-spin-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000530c.bin
9ef29051f1df150420336207354f22278d0db179aa80238b89a01e79187ea1f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x530C 23804 bytes
font_01_sfnt_off0000889f.bin
9c1e48dc8efe3932aaa8c397389a1772b06162b65fa9e6e9c16b850b75876ba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x889F 19464 bytes