Malicious PDF — malware analysis report

Static analysis result for SHA-256 422f67128026c7e6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 13:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8c8c9b94e05638bfa1b190402b575977 SHA-1: 19afc031b71085bb71044476a32955a9856314e4 SHA-256: 422f67128026c7e643b556212b579efb4b276d541fe90c1b68a3fc684e4378b5
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/406889139/coin-master-spins-gratis-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/como-obrtener-10000-robux-de-verdad-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-vehicle-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/latest-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/bux-gg-roblox-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-superhero-city-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/2021-roblox-place-free-bricks_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-undertale-game-script-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hacked-roblox-jailbeak_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-hide-and-seek-extreme-hacks_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxian-robux-hack_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
stream_002_off00003139.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3139 22496 bytes
SHA-256: 8564b08453975669fe02202b51d01172d32fa4135a8ee5acb1ab8263e80df9d1
font_01_sfnt_off00006345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 18008 bytes
SHA-256: aa6dc5b436262444d1843ff4d610bf755db140f9b9a063681551605e7612b957

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