Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0211bd96d39d5f0…

MALICIOUS

PDF

46.8 KB Created: 2021-05-14 04:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7b869b6302d89216c07f0c938c990737 SHA-1: dd55e91767c6c317cb0f24fe0e553eec52adcb39 SHA-256: e0211bd96d39d5f042df13483bcb87c207becee2656eaf5ec7d99068322a6008
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 0.8948

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.xyz/app/431946152/free-robux-no-survey-or-human-verification-game-hack PDF link annotation
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/roblox-download_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/roblox-rules_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/roblox-g_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-fan-club_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_003_off0000494d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494D 26376 bytes
SHA-256: 8cbd73e4179850622f6f5cfd4d07dcb8f351fd2b0b53143bf3ee1fca6584b911
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000091c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C8 19156 bytes
SHA-256: 740843b016d65d6d98e94234348adfc338e782053996300107113ffe61ddc4f5

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