Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3b50d75985d1f4…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 06:21:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ca4630562d44f35d88d23d8334d4699a SHA-1: 7136cad0753d4889dc25cb783aa20a3ac286eebf SHA-256: 5c3b50d75985d1f41d92e49589338c6ca27f9b8a9651148d33868593164ecdf9
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/robux-promocode-hack-game-hack PDF link annotation
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/infinity-clicker-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-hack-apocalypse-rising-2021-download_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/como-hackear-cuentas-de-roblox-2021-facil_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/easy-hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/emojicode-roblox-2021-get-emojis-free-2021-d-_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-skins-free-download-fnaf_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.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_off000031ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31ED 22388 bytes
SHA-256: 2aece80de6fbd5c4835d742014ed0217f604bfb86c7e1a064136efb5f9cde8bc
font_01_sfnt_off00006366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 19308 bytes
SHA-256: bc303e0fab666ef8961e3f63eb2167a8c0e8ad0a5cca1e4ab1b2a55178a169e5

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