Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43ce77b4d26908a…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 08:38:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac6fb91a10f0e691d09e868919e74daa SHA-1: aa3e0f566de47bf57f5c644cec569278f5896fed SHA-256: d43ce77b4d26908a2cdc79ca10cb1f8f4d05939df862cf7e306c8f8a175d8c37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically pointing to a 'free generator / game hack' lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/www-robux-redeem-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-pe-apk-free-download_GM479516143.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_off00004dfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DFC 24012 bytes
SHA-256: 9f67ce1318395b3987f28fb0df16cc7a501e9bbb4c4a5ce5c8515ea117019018
font_01_sfnt_off000084e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 18648 bytes
SHA-256: 61e1175fd0613718da88e3f59775346477bef0226bc79823f694c1fc9380e365

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