Malicious PDF — malware analysis report

Static analysis result for SHA-256 db70cd8b7cfba6c6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 10:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a394c81f3d322323ed82cc48291c9c23 SHA-1: 6207fa5b854697e07ad701799f9bfc59a7971ef0 SHA-256: db70cd8b7cfba6c6a855451674cee578520841a8641033cb3e1bca036641fbfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-free-bonus-game-hack. This lure is designed to trick users into believing they can obtain game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or download further malware. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

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-free-bonus-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-work-get-a-roblox-hack-gui-to-work_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/cheat-codes-for-room-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-into-a-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-earn-free-robux-with-proof-buying-item_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_off0000327f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327F 22576 bytes
SHA-256: 655bf1e3e9bd9220459ce62dfc2914fc9a6849dd482bb520f0255e8afac611fa
font_01_sfnt_off000064ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 18352 bytes
SHA-256: 7b90768ef900af8c4d503bc8b2a117efb516974d9f13f06c1672f765c872eea9

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