Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfa4c808b232db0…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 10:43:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4f678e5e7f9ade0211016721f127170d SHA-1: a052b192d2061f8f4560754c67f36431cc03d00f SHA-256: 8cfa4c808b232db0775b17774e0be55a1a0ba0f7b7f4dac613ab1c2a36bf0298
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a redirector, which in turn points to websites offering game hacks and generators. The heuristic firings indicate that these links are associated with malicious redirector infrastructure and are used as a lure for users. While no scripts were extracted, the presence of these links and the ML classification strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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.co/app/431946152/console-hacks-roblox-game-hack In PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-tiktok-followers-trial_GM835599320.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/deineschuber-free-robux_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/robux-hack-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-robux-legal_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/roblox-retail-tycoon-116-ifinite-money-hack_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/hack-para-obtener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://www.goldeneye-group.com/uploaded_files/userfiles/files/free-spin-coin-master-hack-2021_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
stream_002_off00003112.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3112 22412 bytes
SHA-256: 4b5c1fbc87855acde6b9f8b3e87cebde58d838ba0a332ef6d8033070d8f6d215
font_01_sfnt_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 18656 bytes
SHA-256: dddd114f42df7d6c3ef83c0c8a91d3e5fa426cd31b6536b1ef7451df698c814b

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