Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fceb94befbe6a2d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 22:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 80b55d4e69e5575048a6d3be5995dedb SHA-1: f5f3f31682c7f95c158202bbc7c69d8784ac6cdf SHA-256: 8fceb94befbe6a2d45ae558bc2fc3f60300a00086480624c5431b5e3e0ed95ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one prominently highlighted as a 'free generator / game hack' lure. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-daily-free-coins-link-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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-daily-free-coins-link-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/earn-free-robux-rbxblaster_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-redeem-card-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/insta-kill-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-roblox-money-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-engine-god-mode-script-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/como-hackear-roblox-com-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/currency-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacker-alert-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-unblocked-free-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-shirts-in-roblox-catlog_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/lockview-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-in-your-group_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_off0000313f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313F 22420 bytes
SHA-256: 4a8164b73d11f512a6e292a2d6d63cbe7e08f5e78d5c5e331f787bf2e5618b86
font_01_sfnt_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 18588 bytes
SHA-256: 602990f58edd0fffaccb1593f10b6a26f20777d4b3942483c7e8a81716f82fb0

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