Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49923d90b72a295…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 10:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4a765dfdb346865df548370c566da181 SHA-1: 2ac6c9c169f139d4acd7bc28c73fdd6bd09bda2d SHA-256: d49923d90b72a2950c2d8493c1b41e1a091f76299387b3ff9ccecda220523b29
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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/hack-coin-master-for-android-game-hack PDF link annotation
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/robux-robians-robuxs-hack_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/gratis-hack-royale-hihg-roblox_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-400-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/download-roblox-player-exe-free_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-roblox-card-pins-2021_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-roblox-custom-templates_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-hack-with-facebook-login_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
stream_002_off0000317d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317D 22940 bytes
SHA-256: 4ee9b5be70a144b43a3b5add4c9a6fd41d3d875c9fef31d2f27b6e982fa229a1
font_01_sfnt_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 18340 bytes
SHA-256: ba94336477aed2da98f1e66ca7f9a6cc3eca9255aee4556c7b4d343eb67aac4d

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