Malicious PDF — malware analysis report

Static analysis result for SHA-256 028051cf686e590b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 22:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 13c69f171365ff5eab58eacf4a76a1f0 SHA-1: 6aff8a5db38d6837be882493c93b4396ce4d2ded SHA-256: 028051cf686e590b6d377a35143d8670bc9077d085dec830e3ec5154c902e8ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/coin-master-free-spins-link-whatsapp-group-game-hack. The document body and heuristics indicate a lure for game-related cheats or free currency, designed to trick users into visiting these malicious links. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or scam attempt.

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-spins-link-whatsapp-group-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-2021-game_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-work-at-a-pizza-place-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/icon-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/likes-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-all-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-hackear-todos-los-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-vip-server-for-roblox-egg-hunt_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-unlimited-spins-apk-free-download_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
stream_002_off00003144.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3144 22784 bytes
SHA-256: 88ba215b0b8726b27071c4f1587140cc3b822296cef5b58ab6b5aced925231ea
font_01_sfnt_off0000647e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 18848 bytes
SHA-256: d5a856b0373f9844b4187bf81cfca0cf23e5c997e9df5b12721b74709945ba8c

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