Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8eb58e2f322787…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 10:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 669e0ea720ecdc958eb634eedf0bad95 SHA-1: 8e2c52e095bbbc691a2fba1812edf51d57dae25f SHA-256: 4a8eb58e2f322787b84d03832c60d7b65c51099f8d4a347acfd5f9ba20676d0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and cheats, such as 'minecraft-windows-10-hacks-game-hack'. This lure is designed to trick users into downloading potentially malicious files. The ML classifier also strongly indicated maliciousness.

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/479516143/minecraft-windows-10-hacks-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-glitches-and-cheats-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-make-dance-party-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-a-free-generator-for-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-to-get-money-in-gta-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-client-2021_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_off0000322e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322E 23372 bytes
SHA-256: e2405ef6f6e19bb00005c03cc96a3e6788bc2c4cc090abe33585ac5a5513f518
font_01_sfnt_off00006600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6600 18980 bytes
SHA-256: d5302a4262de0fe7b8485f3acdacc44f64fa6fcaf4d5e81661a82341b69d1a02

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