Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68671beba0476d1…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 08:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0a640e6f78b6d151a5293f82a236e50 SHA-1: eea5639203aa136171cb74f10f1dcb95c8b05f4c SHA-256: b68671beba0476d199012abdb64fe9ed9222a10f68e7203593b15d80e8294598
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator / game hack' and displays a fake CAPTCHA to trick the user into interacting with the document. It embeds multiple URLs, one of which is https://netcdn.online/app/431946152/how-to-get-free-outrageous-builders-club-on-roblox-2021-game-hack, likely serving as a redirector to a malicious payload. No scripts were extracted, but the presence of the fake CAPTCHA and game hack lure strongly suggests an attempt to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/how-to-get-free-outrageous-builders-club-on-roblox-2021-game-hack PDF link annotation
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/which-pubg-uc-is-best_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coin-master-coins_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_off0000505c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505C 23968 bytes
SHA-256: 15a1ed26641b1bab4c2617b2deab0b34aa842cc6d3c3b2e203005877fe982383
font_01_sfnt_off0000871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 19568 bytes
SHA-256: 94514bfe81db6feffbdcdf371c048d3474ca809561b1b6b151fee7eafd3178be

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