Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8209b8b6ae9f0a4…

MALICIOUS

PDF

46.0 KB Created: 2021-05-19 22:38:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb3083890d76026eee1c94c789ae043c SHA-1: 956563092c531a62e9eea8fd7edac8f8490871f3 SHA-256: c8209b8b6ae9f0a4fe9878262dbcc55862bb867f181f7059117163bbda19746a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings confirm these links lead to known malicious redirectors and a lure for game-related exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-robux-pins-game-hack In PDF document text
    • https://estalagemmonteverde.com.br/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DC 27132 bytes
SHA-256: 49b980a86c00113f9e6efa3a743784f0732cd93ca5fdd69abad0c0bf715736e5
font_01_sfnt_off0000846c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000917e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917E 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c

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