Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42da6e06164c5db…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 11:27:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 402f391c3ba3d4d6b3e20ae9095d6933 SHA-1: c5b64fdc8f072fe4ff67586a24f72517e6926309 SHA-256: b42da6e06164c5dbc92ecd567650649e030c08eb9559703757eb4f1fa7d6f6f2
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/app-master-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/how-to-use-cheat-engine-on-roblox-2021-august_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/april-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robloxcom-free-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-and-obcxdaniel_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/all-roblox-promo-codes-free-items_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-robux-now-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-free-now_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/btools-hack-roblox-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-skins_GM479516143.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_off00003192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3192 22700 bytes
SHA-256: ac817a4846e8b68b47b901ca61f5c628456fe6d12990a83e7adbda12883aa12a
font_01_sfnt_off00006430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 17748 bytes
SHA-256: 7f35764ca496769aa6fdbaf6c3111c97d2ec009e45c432c622fda67b674d07f4

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