Malicious PDF — malware analysis report

Static analysis result for SHA-256 e436e876ef6d6c8e…

MALICIOUS

PDF

32.8 KB Created: 2021-07-05 23:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d26250a0112b7ca88a46b15f225fcb7 SHA-1: 640035ef724ce57b8b035eda028a45339a6825f3 SHA-256: e436e876ef6d6c8e59c3f0e909f00bbf55dbef571e32f84989863cba9b63b4c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as generators for popular games like Coin Master and Roblox. The primary lure appears to be offering free in-game currency or hacks, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a redirection chain designed to lead the user to potentially harmful content or further malware downloads.

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-fan-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/tiktok-free-view-30_GM835599320.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-hack-that-actually-works_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-gift-card-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-personaje-hacker_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-clothing-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/bux-free-robux_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
font_00_sfnt_off00002dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAE 21892 bytes
SHA-256: fb003fd4a011fa1b6450c425660d545f5f0b8ee61e3748207a0132b68a5163c9
font_01_sfnt_off00005e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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