Malicious PDF — malware analysis report

Static analysis result for SHA-256 c576a61e37b704d7…

MALICIOUS

PDF

31.1 KB Created: 2021-07-29 23:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7d81e5d17999f90f5920f0db530ad4d SHA-1: bc74ca714a442aec0ab7cf36cecfc3266f7f8a22 SHA-256: c576a61e37b704d7d6c394fdde3d352437e1aaacc65553d1eb004657f7b7c647
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, specifically advertising 'free Robux' or 'game hacks'. The heuristic firings indicate these links lead to known malicious redirector infrastructure. The document body also contains a prominent call-to-action for a 'Robux Generator' and a link to the primary malicious domain, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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/431946152/roblox-free-robux-hack-game-hack In PDF document text
    • http://genialica.de/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://genialica.de/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://genialica.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://genialica.de/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://genialica.de/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://genialica.de/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://genialica.de/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://genialica.de/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://genialica.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://genialica.de/images/tiktok-views-free_GM835599320.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_off000028ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28ED 20976 bytes
SHA-256: 715c46551e22609bd1c4e29dc1b43a0da3beb78d89813f23bf5c5b0a351a6649
font_01_sfnt_off0000562b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562B 18672 bytes
SHA-256: 572aeff40ad1b306a951133ae20c38029d3294927ec451410f749fe2fac9a184