Malicious PDF — malware analysis report

Static analysis result for SHA-256 812705e27a6edd4f…

MALICIOUS

PDF

50.6 KB Created: 2021-06-08 17:26:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c4eda3b5dbe9f1c58f4cb58c0fa75dae SHA-1: dfb89e21077e155aa9f894f28b6385d7927d3a3d SHA-256: 812705e27a6edd4fc655ceb044841982c6f43e0d922ce6a497033db6005bf7a9
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 0.9779

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.tw/app/431946152/cheat-engie-how-by-past-roblox-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-free-no-human-verification-pc_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-roblox-fort-albreta_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spin-coin-master-2021_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
font_00_sfnt_off00005420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5420 25756 bytes
SHA-256: 0f01af1e5561d3996d1a4cecc1d2b8f1e071ced4e022e478bbe7d2f85e0a65bb
font_01_sfnt_off00008f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 6856 bytes
SHA-256: c569170cc3d1848c0c311e7179e843d24a5385ebd65a21c7531e8e69755d5403
font_02_sfnt_off0000a057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA057 19188 bytes
SHA-256: 9726aadf2c4a6d9c354ca2220e9ad448e032bcfb84ad8c92a93beb6386d8de48

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