Malicious PDF — malware analysis report

Static analysis result for SHA-256 09176390ee717526…

MALICIOUS

PDF

48.0 KB Created: 2021-06-08 13:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c8676318c59baaf294b86da276f43bb1 SHA-1: 0929008c89bde82a4620fb3bd7155b4fb18817ad SHA-256: 09176390ee7175261fbc5545e0b920a9b49a5eebcf53f96f0c12511f9c2a3faa
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 0.9871

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/hack-for-robux-2021-game-hack PDF link annotation
    • http://yogaschooldecypres.be/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/blox-rewards_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/gamesofficenet-hack-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_off0000514e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514E 32388 bytes
SHA-256: 1956229f39ef54b41c65b420474d32571a42a4a237e8be7c875aeff52ccaea6a
font_01_sfnt_off000097b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B4 18816 bytes
SHA-256: 1962b9c9795e1733cc6a8b6ed8d8e1c791e7af410e2202646f60ba1693ded620

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