Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb0f87a8c70751d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 17:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 472ec5208e668b846cc5e89ba2395632 SHA-1: 96ea494b4087326f56f31c5da2ba6788dca4f3ea SHA-256: 6bb0f87a8c70751db35185d302528920e585fd29c2ad3d8558d4ae50931c52ef
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.tw/app/431946152/free-roblox-groups-game-hack PDF link annotation
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-sword-fighting-tournament-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/hacks-para-roblox-tycoon_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-administrator-badge-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/lua-executor-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-free-rthro-packages_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-murderer-mystery-2-gem-cheats_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-noclip-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/hacking-roblox-peps_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-the-free-prize-giveaway-obby_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/game-joining-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux-using-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-cheat-in-roblox-to-get-robux_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_off000031d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D1 22312 bytes
SHA-256: 6dabf91e19dadb84708767edfaf7cd03b4f63da4b6aff0bf8d4f24ae6fdbe827
font_01_sfnt_off00006366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 18968 bytes
SHA-256: 4728b92cf848fdb1cd1eb8cd3d9e6ae7930638f040f81f2792b6d3037428f5d1

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