Malicious PDF — malware analysis report

Static analysis result for SHA-256 c266c4bf227d017b…

MALICIOUS

PDF

36.5 KB Created: 2021-07-09 02:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aada92109f028314e1c8a5adf668ba1a SHA-1: 6f0e94484a5c2a6246086089d95fe943d490df9b SHA-256: c266c4bf227d017bcb8a40bfa29b983957528a9abb82f7504883a89dbea5d38c
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/431946152/inappropriate-roblox-games-2021-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/roblox-free-copy-place-service_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-pet-simulator-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-use-hashes-to-hack-someone-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hair-girl-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fps-hacks-roblox-aimbot-not-pf-v21_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/secure-payment-with-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/best-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-at-freerobuxeu_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-robuxian-awesome-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-online-hack-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-use-cheats-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-ways-to-get-robux_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_off00003596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3596 22544 bytes
SHA-256: 6faf421c3499761b9a6aff48478cdcebdaee431c7c8be35bace2cd7fcfe098e6
font_01_sfnt_off00006818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 19548 bytes
SHA-256: 52d5a8dd922b8cb39112b7e45497e38a5d4104f0d7200415e33336fa157fb9f1

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