Malicious PDF — malware analysis report

Static analysis result for SHA-256 40256c66319b76cb…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 15:39:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b018cf4f83795e67c2fa1df29b737dd1 SHA-1: c5305b6b465789b99da8537ceab6c55eb3937d02 SHA-256: 40256c66319b76cb2447f068e72b779e357e69e385ced767e26d942cdb0b836f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and a call-to-action phrase related to 'free Robux' and game hacks, indicating a lure for users. The primary URL, http://netcdn.tw/app/431946152/free-robux-games-on-roblox-game-hack, is likely a redirector to a malicious site or a download for a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

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-robux-games-on-roblox-game-hack PDF link annotation
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/tradelands-roblox-cheats-see-in-dark_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-roblox-accounts-with-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-master-hand-hack_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-get-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-games-free-online-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/como-hackear-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-hack-2021-september_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/jailbreak-roblox-hack-mega_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/tiktok-free-3d-model_GM835599320.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-get-free-robux-instantly_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_off000031f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F5 22612 bytes
SHA-256: 6f4b775ce34eb3805d9749d0639747db14f1edaa5c564c14a42c60b5dcd33bde
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 19052 bytes
SHA-256: 56f4e65812c403ac511da7c683eb66c8172328fd08918d47063ad90a487708b4