Malicious PDF — malware analysis report

Static analysis result for SHA-256 467449c8cd6fc59f…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 11:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e5e369a6996bb259d2506b5cd074a201 SHA-1: 69dfbdd23f10d0cba27d122385191734afa1b276 SHA-256: 467449c8cd6fc59f7c9c2d449e4b5d9a9584c3f23534e088dc4fa13d9647b449
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple embedded links and a call-to-action lure, directing users to websites promising game hacks and free currency. These links, such as 'http://netcdn.tw/app/406889139/free-spin-online-tool-coin-master-game-hack', are likely intended to host malicious content or facilitate further infection. The ML classifier also strongly indicated maliciousness.

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/free-spin-online-tool-coin-master-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/wall-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cooo-tener-un-pokemon-roblox-free-pokemon-brick-bronze-beta_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-2021-unpatched_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-plugin_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-invitation-template-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-with-robux-v3rmillion_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-robux-hack-2021-no-survey_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_off0000366e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x366E 23016 bytes
SHA-256: 764e8dc8e52d523258c49f4afc40f9aa1c0c8fbf2251bb404b8b986ec80ab583
font_01_sfnt_off00006a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A28 18248 bytes
SHA-256: 652ac15c20e032905adb19760bc376fa248cf13b54e93c508fb033e8a92ab292

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