Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b608ec5797ae02e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 03:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fee8c745a0909c9b7cb9504ddddbd79 SHA-1: 5649457e35d14360f61a5dc919674bf6f4a28b8c SHA-256: 3b608ec5797ae02e61333218e884be9dd3ddb5698cc496211ed7e8ec93c682e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary link, http://netcdn.tw/app/431946152/www-free-robux-com-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a lure to download or access potentially harmful content, likely leading to further malware or scams.

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/431946152/www-free-robux-com-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-table-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-dec-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-sell-roblox-items-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/run-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-life-in-paradise-free-admin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-2021-live_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-ore-tycoon-2-bag-obby-cheats_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-hack-no-human-verification-real_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-robux-hack-script_GM431946152.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_off00002d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D05 22908 bytes
SHA-256: a83c32e6bd7ce41c4632d1ff305d018d6d36f58b23787eb1dbbaa265690c734b
font_01_sfnt_off00005fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 19336 bytes
SHA-256: a173ff8a3a1fb1a8f757a1ab0f7adc35a375ad8a6d6bf5003b7cfea3ec8bf678

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