Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b14c7b1a42a5ab…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 10:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 21dd564cbaab36c14ce75dceaa575ad2 SHA-1: 15da8b99f13c766fdd01a2a510231dca4194100f SHA-256: c9b14c7b1a42a5abec656ea48405b16714b8a8ea7938195958103fb5a26804cb
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 0.9865

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 https://netcdn.online/app/406889139/easy-coin-master-hack-without-verification-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-and-coins-in-coin-master_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
stream_004_off00005433.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5433 24600 bytes
SHA-256: 6e7714351e63dd132d37eeb5b28d8e05c29f6650e8012b6cf4c0a52ffea670e5
font_01_sfnt_off00008c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6B 18532 bytes
SHA-256: 85e2e278d23887cfad26fbfbc1b407b9b567820416a2cd1414c6df36cb3b2203

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