Malicious PDF — malware analysis report

Static analysis result for SHA-256 6492582978585b8d…

MALICIOUS

PDF

34.9 KB Created: 2021-06-24 08:40:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6b845351c92e109cc301d7121f18bbac SHA-1: 9d63e14b576c25ca40d35c0d4a91374e93ee73d4 SHA-256: 6492582978585b8d5d5a4b5bb62cd96630b71c60973913dc87e4a9fc62eae345
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/roblox-hacking-website-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/robux-free-ultimategamer365_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-on-huawei_GM431946152.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/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generaters_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-cheat-download_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_off00003095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3095 22748 bytes
SHA-256: 81a3509d2fbdd5ba90cc8989a3ef38d5487562414a10994e1854ce8a17263cfa
font_01_sfnt_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 19076 bytes
SHA-256: 62b0d36ce948ffdc11f28ab91e3b337edea8e9919308700d4ef5645592577123

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