Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6738b2f95cfd24…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 21:54:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 850edf46b216cc686d41217468504c7f SHA-1: c6034b85d2a8b34e2686be1bdea3115d619370a0 SHA-256: 4c6738b2f95cfd24fbcf81d87c03e61acb4175ed838e7f577d4113728d601718
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/how-can-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://pustaka.pasca.unand.ac.id/repository/free-roblox-gift-card-codes-2021-october_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-apocalypse-rising-hack-exploit_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/robux-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-sex-games-free-model_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-mobile-app-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/videos-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/cheats-for-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-robux-on-bux-gg_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/sfx-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-card-5-million_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/comment-avoir-un-dominus-aureus-free-ssur-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-admin-hack-2021-november_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/hacked-roblox-song-id_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-roblox-games-that-give_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/robux-boost-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-robux-by-pressing-one-button_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
stream_002_off000030bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BD 22416 bytes
SHA-256: 2273c3e22ded0f12a8eb990446f9f1aaf799bdcab011d9605521c913b8adf5e8
font_01_sfnt_off0000627e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627E 18336 bytes
SHA-256: 37ca97c2691b43cd452b048f4f7c78c5ad4d0dd2b0202caad78cb0ffb9f2e73b

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