Malicious PDF — malware analysis report

Static analysis result for SHA-256 729ffe7c86429f73…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb5881a9198926bacd67e8afc89236e8 SHA-1: 6bbbfa71acfc190800f8e4cb40fab0bd32a90eae SHA-256: 729ffe7c86429f7309a771fbe31059dedc3e7d99c8524baa76d8f8a3bf862b4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising 'Coin Master Hack Apk'. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. The document body and extracted URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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/406889139/coin-master-hack-apk-35-11-game-hack In PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-robux-codes-no-inspect_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-app_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-stuff-on-roblox-webste_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/pokemon-go-free-coins-ios_GM1094591345.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/roblox-how-to-get-private-server-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/hackaron-roblox-hack-free-robux-tickets_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-clockwork-shades-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-hack-roblox-mad-city-gui_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-hack-roblox-free-robux-no-download_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
stream_002_off00003084.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3084 23060 bytes
SHA-256: 835e8fbced6152fcc35dc5dcfb5a8d55a669daba695f7c008306cca783019c95
font_01_sfnt_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 18592 bytes
SHA-256: 7f49051940b6b9efc6132f30ff89e7b8d09fd75ee36cd2478622d195921c531a

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