Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6e87a23e10835e…

MALICIOUS

PDF

45.4 KB Created: 2021-06-02 20:46:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 89539014a87baaf30db0b35951af7046 SHA-1: e5c8428b6c1e0e32fbaa36c29ceabb8fe1d11b69 SHA-256: db6e87a23e10835e9a469f1fbc9dad0404a7bdd64d57fbd8f5059fcae9c38a9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as 'game hacks' or 'free generators'. The document body, though partially corrupted, indicates a lure related to obtaining free Robux for Roblox. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent, likely to lead the user to a site that downloads further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/431946152/how-to-get-free-robux-on-roblox-2021-december-game-hack In PDF document text
    • http://yogaschooldecypres.be/images/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/pokemon-go-free-to-download_GM1094591345.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/mcpe-client_GM479516143.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-safe_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/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-youtube-tiktok_GM835599320.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-do-u-get-free-robux-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
stream_004_off00004f3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F3C 26604 bytes
SHA-256: e799ac26f4df2f48d42b35963e9e2fa2773d417c2f91acbd3f038a2e96944d6e
font_01_sfnt_off00008c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C45 19184 bytes
SHA-256: e092542f34994cfe44309d837ad718a2876831504f020c8493b7a1014802e864

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