Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeea11e98604c0d2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 12:48:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 17cb445225c800ce1c1b2bc7a4572c49 SHA-1: 8737b6ad53a6b946c87bf207f62965440f053016 SHA-256: eeea11e98604c0d29959b2d3285977c5459a29ca843e5a00ba7fa54d953f691c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, primarily promoting 'free generators' or 'hacks' for popular games. The primary URL, http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-iphone-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering lure to drive traffic to potentially malicious sites, likely for credential harvesting or malware distribution.

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/how-to-get-free-spins-on-coin-master-iphone-game-hack PDF link annotation
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/oprewards-login_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-tickets-cheat_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-cheat-in-roblox-get-eaten_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/create-free-account-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/robloxain-roblox-hacks-robux_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-adidas-pants-free_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/money-cheats-for-rocitizens-in-roblox_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-a-chromebook_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
stream_002_off000032e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E1 22848 bytes
SHA-256: 6794f97b64ee0babe4ec00f1296c6acab356faa6fe3611a780ae8993caf82df7
font_01_sfnt_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 18504 bytes
SHA-256: fb94ba828be114796ce33ae88e534852be4d565d50d53dd599267a6729c84c7e

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