Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca33940ca1ddecd…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 05:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 41f3769b1ba3b136b31d3deffd3ac3d4 SHA-1: daf76f8e4831b4cab015cfe2f90fa223c0a5476f SHA-256: 9ca33940ca1ddecdf39087b80573d2dc5fb2520d0b71782fdf8c34386c7ae9cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly lures users with promises of game hacks and free in-game currency for popular games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, and the ML classifier strongly indicates maliciousness. The primary URL, http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-ios-game-hack, is likely the initial landing page for a phishing or malware distribution scheme.

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/how-to-get-free-spins-on-coin-master-ios-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/all-the-hacking-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-free-robux-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36F7 22656 bytes
SHA-256: 41d86e4807dbdf69e72f94d8d8dde9694b3cbbc4c2f06c2cf8ba443d8d6782ad
font_01_sfnt_off0000697c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697C 18336 bytes
SHA-256: 8feb4de5e0b81dfb5bdd45a4e83ab8cdf26242fb4b01d276e6d24fc13f5d61a8

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