Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d65af8284c77e10…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 00:21:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f4ef8943dca45fa300080987b28f770 SHA-1: 1247b28724a9e1c58dacf61de67536fe37dbc0a6 SHA-256: 8d65af8284c77e1040fab0e5f774a6f752b40c4aca2c0f2ff507fcfb7acfcd83
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-unlimited-spins-game-hack PDF link annotation
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-verified-by-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-roblox-hats-3_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_off00002f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F02 22436 bytes
SHA-256: 51dd9eefb3ecacd58a51d36b7cee6f0619accb9e4e13b2731d1c5245448ac8c3
font_01_sfnt_off00006100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 18704 bytes
SHA-256: 2e8c7de27f3ba86e55e5e355ae95bc495c43d663aeff332330d22d9f8881b6ba

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