Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b52f0f63760c00c…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 09:50:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c75c3aa6d2b008e7c59bb08f05e99749 SHA-1: 67902ec701e77c5fd95e57864dcb60b15d90c402 SHA-256: 4b52f0f63760c00cbe2ca67f9f96e5e1274e33e054ddc3385894cc4d0fdb826c
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/www-claim-gg-to-earn-free-robux-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-2021-1m-free-robux-give-away_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-and-tix-hack-no-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-roblox-com-robux-free_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/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/april-12th-2021-roblox-hackings_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-app-real_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_off00002fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA3 22544 bytes
SHA-256: 695f40e6e2cde8948e1e8608db4f4f6e0482290f241d8f3203ea0f8ad4733698
font_01_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 19532 bytes
SHA-256: 81a16b1cace0ba4e2fcc2c03b739a37460d35c46bdba9185bcc1ba81366c982a

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