Malicious PDF — malware analysis report

Static analysis result for SHA-256 056d6d3fdb24f578…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 15:54:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8ad70b45e1d441e5c21ddd5e2eb87a4 SHA-1: dd001eaa2ca9d55b4de01323f5ea8b6bcd8f3f8b SHA-256: 056d6d3fdb24f578c9dc873de47bb99d2fdc3ef9ed8ffd8b420458c589be323a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.co/app/431946152/why-you-never-want-to-use-free-robux-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/cheat-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-download-on-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/irobux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-donloaden-free_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3298 22436 bytes
SHA-256: 1de0106d5d75aacd1cfba970f6c701afd6ce71e882d7630ab78df7ed75fd5917
font_01_sfnt_off00006480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 19640 bytes
SHA-256: 8f67df20c260cc73bb8fb2d3179c85afcfc5aa94505551babbb78cbb69b6a679

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