Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a274e916fb9d42b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 11:46:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 86e2e5a2b7ee374c27f8c8f90b7d2ab2 SHA-1: 3884ec4aa64ad7e13c234250529c5c98861e5af3 SHA-256: 5a274e916fb9d42b258317f761db3eb8ec2b24daa8ecb684699fefaf3a584573
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free spins, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and content indicate a phishing or scam attempt.

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/links-to-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pubg-uc-carding-telegram_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robloxain-roblox-hacks-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robux-cheat-no-survey_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-levitation-animation-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-body_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-roblox-accounts-abandon_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-that-really-works-without-card_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_off000034e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E1 23380 bytes
SHA-256: 7b15baaac473a4ce1d9a4ff04b8d4398a78678a495fa7b67086c6388a50375c9
font_01_sfnt_off000069c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 18344 bytes
SHA-256: 2e167f99f2af49078931cfebfcfe28252f1904d6ccb71364dc6011f55fa7d4bf

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