Malicious PDF — malware analysis report

Static analysis result for SHA-256 3156de2568fc72a6…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 16:43:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9e2542b5bb835372639b47192b17f6b7 SHA-1: 0a9fc1be4a3c4afce51b19e4ee154a91a9f50e4f SHA-256: 3156de2568fc72a6487bb2d6dc28a3a2781c967336500ad0d5167cffbb1def56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector, designed to trick users into visiting a site offering 'free Robux' or 'game hacks'. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely leading to further compromise or scams. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-robux-discord-servers-game-hack In PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/cone-master_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-google_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-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
font_00_sfnt_off00003188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3188 22492 bytes
SHA-256: 316a5f105d457d3dbc35c11937451d92f59698048ef5e9e5221e8d93f0dfc6ac
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 19292 bytes
SHA-256: b115a2c924602d7af6df8e60d1d5a0905588960aaa46bc3f51eeaab49e44319b

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