Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52aa8b0a1ecc70b…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 12:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fbeb7963e701dba3dcbd08283e8adeb3 SHA-1: 9587417ea5d28cd2805facb89fb43b923cb79b4f SHA-256: d52aa8b0a1ecc70b8ca38224e32bb3a82bce3d8311affc9de8256c4dcfc6ee3c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9769

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/406889139/can-i-hack-coin-master-with-lucky-patcher-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/tiktok-free-books-website_GM835599320.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000528f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528F 24612 bytes
SHA-256: ffb13e4a9c47cfe6510af58b4d8fc09c013822ce55afb8662b1228036c82d597
font_01_sfnt_off00008ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE1 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9494 18552 bytes
SHA-256: 8be759f3e3349301e7dcc78824bb158111b4f4e5695afa9281379139d383196f

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