Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae74c1fbdcfd5b1c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 10:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b4dc2732d58ff2b8d86c1c596dd992d SHA-1: da3cb4251508819079de8584dc09adc2fdfe2b4f SHA-256: ae74c1fbdcfd5b1c85983dadb59c2013dd4e15806cffee8033585f4e1a0034d1
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/block-best-robux-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-any-gamepass-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/5-dollar-roblox-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-clothes-sites_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-exploit-hack-october-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/near-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-anti-cheat-update_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/facebook-cuentas-gratis-de-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/games-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-free-videos_GM835599320.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_off000030a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A3 22036 bytes
SHA-256: 04e7e70f897e5f8cb4b92e5549d6b41ef75140472552c2e31c70c7742c8aaa2b
font_01_sfnt_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 18900 bytes
SHA-256: 23ffc9afa79f6964db2b60bd4774f276c737faf5613dfbf67615f79eab430b10

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