Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12922aca04ba275…

MALICIOUS

PDF

33.3 KB Created: 2021-07-09 22:23:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 246d06ac0bed15325cee8caf68400caa SHA-1: ac1d64fb7d05c39cfae33a75ac2bc51bfa7d79b3 SHA-256: b12922aca04ba2751e33f63e71dd1a72acdd7befccf9ac0ea4691bd328997de6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors that impersonate game-related content, such as 'free generators' or 'hacks'. These links are designed to lure users into clicking them, likely leading to further malicious content or downloads. The presence of a visual download button heuristic further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-images-free-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-game_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/tiktok-free-100-likes_GM835599320.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/ultimate-free-spins-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
font_00_sfnt_off00003028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3028 22100 bytes
SHA-256: 2f961a103e3596c9e5b75fe0bd7173a63124718f8784d98f2116dab8624fd1fe
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 18116 bytes
SHA-256: 76604dd5740139514d3fd46c2a9d9c838f52c59b348f00b4ee9f07d20b77a693

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