Malicious PDF — malware analysis report

Static analysis result for SHA-256 366bc68edfc63a92…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 21:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3c99111a5130039aa0bcee2e439d8177 SHA-1: dd2207d199d7cdd34ddd399243b5fbdb503c44b4 SHA-256: 366bc68edfc63a92f4c7b0426b94d3aa566ca1862d13d0589215f977849103ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a call-to-action phrase, directing users to a URL associated with known malicious redirector infrastructure. The primary lure appears to be related to 'Coin Master' game hacks and free spins, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure and embedded URLs 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-rewards-free-spins-game-hack In PDF document text
    • https://tpp.com.tw/image/data/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-tower-battles-money-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-case-clicker-cheat-engine_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hack-coins-pizzeria-roleplay-remastered-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-hack-no-survey-or-verification_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_off00002eb9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EB9 22756 bytes
SHA-256: 83ba23473297726c08f9d48da5f3518ca28e84b9d17fa66affa817b3ce42f66a
font_01_sfnt_off000061f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 18512 bytes
SHA-256: 6bc66a7c9124691c5dbe04e2c8d08202ba1ceeb7f14ff76ef8eff16a4b1fabf8

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