Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4503d33d8a8368…

MALICIOUS

PDF

35.4 KB Created: 2021-06-22 04:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aaca91dd13f83c225526e029aa7eb9b7 SHA-1: 704f7e307a0150bf76bd122b7a85cb74a76f7d57 SHA-256: 1c4503d33d8a8368bc65c73a7dd9a05809549a2c94af2ed2d800124a2a4c66b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are disguised as game hacks and generators, such as 'roblox-bee-swarm-simulator-free-honey-generator-game-hack'. These links are designed to lure users into clicking them, likely leading to a malicious website or the download of a secondary payload. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure tactics.

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/roblox-bee-swarm-simulator-free-honey-generator-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/script-to-hack-generator-of-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-island-royale-cheats-for-bucks_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-apk-hack-unlimited-robux-ultima-version_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-with-human-verification_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox36com-free-robux_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_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22508 bytes
SHA-256: a5aac1f571243a6f18798204cbeae9dd78c03a374c76f75f0e3b9fcc90c8493a
font_01_sfnt_off00006456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6456 19432 bytes
SHA-256: 693e0c4cb89e82e0dc725f4be1d011bffed13ee08bb2ad23ae1f9dfbd09d889a

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