Malicious PDF — malware analysis report

Static analysis result for SHA-256 98644582078226f6…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 22:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3e229179f7ffe1d09ddf2fc4c157941 SHA-1: eb3f9fefe5f461a46bd5962db983ced2e2e3e39a SHA-256: 98644582078226f61dc30482e6865ba037060279dbd3e40b2772a3ab24e516f9
160 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a guide for the game 'Coin Master'. The presence of a high-confidence ML classifier firing and an external URI heuristic strongly suggests malicious intent. The document body and extracted URLs point towards a phishing or malware distribution lure, likely aiming to trick users into downloading a payload.

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/how-to-log-out-of-coin-master-game-hack In PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/how-to-hack-accounts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-tiktok-fans-app_GM835599320.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-from-creating-a-game_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmutanjungpinang.sch.id/__statics/gudangsoal/files/free-games-coin-master_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_off000033a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A1 22716 bytes
SHA-256: f32aeb3de6508fd3e072dc498d7c2afefcb2aa5b5b728dc32f8251f3c769873e
font_01_sfnt_off00006696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 18140 bytes
SHA-256: 306109c3349e8d29b2790c39b29fd4e9a572686a4af6e330bd3a6b0da0f363de

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