Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d8ddb6506e2256…

MALICIOUS

PDF

35.2 KB Created: 2021-06-24 23:41:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48670dffc71cf0969c76fb8fe17ce368 SHA-1: a7b69a01ce9b2b0b085e5d5a58f70714a75f9c9d SHA-256: 28d8ddb6506e22567a82fd0200f04b13c8a9cc666452abeebbf0924fe939d63e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and in-game currency to trick users into clicking malicious links. The document body and heuristics indicate it directs users to a known malicious redirector infrastructure. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malware downloads or phishing pages.

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/pokemon-ultra-brick-bronze-roblox-free-shiny-eevee-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/hacker-suit-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-mobile-cheat_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pubg-uc-kaufen_GM1330123889.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/inject-hack-roblox-com_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pokemon-go-free-0-iv_GM1094591345.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-btools-press-n-script-hack_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-windows-10-key-free_GM479516143.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_off00002ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF0 22444 bytes
SHA-256: 7424440b0ecef26fc1744d719b14adb9b8481027ea093e3346d24917dca552e5
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 20000 bytes
SHA-256: 3aa1794a74306e4a089408c945fdaebeaad4f3d25d098d8387c3b95a489a9bf4

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