Malicious PDF — malware analysis report

Static analysis result for SHA-256 9526bb6c0f615306…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 07:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da9869d01c633e220120deb6c334ea1b SHA-1: 83166eb6323c812dd23ace6b947382232af22dd1 SHA-256: 9526bb6c0f615306c8b6d9cbcc318ca69b6f76285f97ce872d55c47450842c46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/479516143/wurst-mc-game-hack. This lure is designed to trick users into clicking the link, likely to download malware or be redirected to a phishing site. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/wurst-mc-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-prison-life-wall-hacking-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-birthady-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-promo-codes-2021-july_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-games-stealing-free-models_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-use-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-change-roblox-name-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-scam-site_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-free-robux-tips-and-tricks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.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_off00002f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8B 22696 bytes
SHA-256: 3ca628be8b918f3e46ddf3c0240d07192653cb9b15fab67b4e0c7d371b04e62a
font_01_sfnt_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 18072 bytes
SHA-256: f2e49008d51297eeb1fc8be2ba2f15def21feb23153b94f58eb81aee8282afc5