Malicious PDF — malware analysis report

Static analysis result for SHA-256 8525bd4981862201…

MALICIOUS

PDF

36.8 KB Created: 2021-07-05 18:50:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4f10192c25afe6b486e85d21c37f6853 SHA-1: a9a09bd0a1fe2ad74e90e67a36d8a3724e1f9478 SHA-256: 8525bd49818622019d4f26b37a9cd29b7c737a5e49192e1e17208706e83fb90d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/406889139/free-spins-and-coins-coin-master-2021-link-game-hack, is flagged as a redirector for game hacks. Numerous other PDF files hosted on related domains are also referenced, suggesting a campaign distributing various game-related lures. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.tw/app/406889139/free-spins-and-coins-coin-master-2021-link-game-hack PDF link annotation
    • http://www.pspmrsmbpj.com/opac/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-guest-shirt-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-roblox-codes-2021-no-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-how-to-get-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/hacked-noob-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/cheat-codes-for-roblox-on-phone_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_off000036cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36CD 23248 bytes
SHA-256: b92b293315812f16836c8738d0135871758a8c1edef2ddd594ba9e94c8514aac
font_01_sfnt_off00006b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B35 18920 bytes
SHA-256: 5da8567ac5cad1a9e8b19f4308895a295b9244689bea2bda45786747592bc9c5

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