Malicious PDF — malware analysis report

Static analysis result for SHA-256 252f77586f3b1714…

MALICIOUS

PDF

34.9 KB Created: 2021-06-21 09:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 56e72a53fca6d543ae6898fdbc7b8e43 SHA-1: 8616b8941091d340ce4a911fb3c4f30ce20d705e SHA-256: 252f77586f3b1714b9d89e373bf0eba5324ae30e9c7d3362f2f4918d8d92942f
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/free-robux-website-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-hack-free-robux_GM431946152.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/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-generator_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/how-to-get-free-robux-easy-on-tablet_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-actually-get-free-robux_GM431946152.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/free-robux-real_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-2021-september_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-robux-for-free-2021_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/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-pe-hacks_GM479516143.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_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 22216 bytes
SHA-256: 22b89f3bfd5ee9cf2a4d5040423d9793556f30e95b65d026188edab4f676980f
font_01_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 19136 bytes
SHA-256: 91d819a85e08464702b4d2399b2944ce52da70a48c8f9d70c1ee064a4c662f69

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