Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c50d464e567495…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 23:44:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7fd259f4495c33bf98c50f1590085e1b SHA-1: 1443ea1080beb4e21187685f29d65a3a9069766a SHA-256: 90c50d464e567495ecd6184f2eb1846c1ca4e0115e2d57c40b445d46f1488c83
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/406889139/coin-master-hack-app-game-hack PDF link annotation
    • http://www.jsvillas.com.tw/assets/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-exploits-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/como-recuperar-mi-cuenta-hackeada-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-free-followers-generator_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/games-cheat-engine-works-roblox_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-website_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-In 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_off00003086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3086 23028 bytes
SHA-256: 68342bb29a372d9d975cf756a8e2b5724740c7343795a4eef6353df3cbe3e76e
font_01_sfnt_off0000645a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 18180 bytes
SHA-256: 5b637a8a036eab97bffff91a515cae84fc40b6bddd589e778cc2e69a12b03167

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