Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cd0116ba88118e…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 05:07:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a0ae2d4275274ca4338c252a02f5017 SHA-1: d91372596297766b947b4ce85dcbafcfe6c3e5ae SHA-256: b2cd0116ba88118e249113daff98cdf00746f8388bc4031b4e81221654aea59e
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/479516143/minecraft-esp-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-robux-no-installing-apps_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/cch-ly-robux-free_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-lucky-block-battlegrounds-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-roblox-gift-card-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-robux-hack-2021_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_off00002fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB4 22060 bytes
SHA-256: ef769049ca3e77d3ba5d8ebca6931efda23ce58e626cbdb0e8df3bee28800666
font_01_sfnt_off0000607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 18032 bytes
SHA-256: 0c7e654f40756f5f063257c1325cfef5f0fe5869090db6a0beff4020815aa276

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