Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17e61466b3c39ea…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 17:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff92ad87488a07ed8cf1f164e43c0f4c SHA-1: 480b3d0632211d116a3540c4701de71c40139cf0 SHA-256: e17e61466b3c39ea199c949f644a93f2cd8674af305e9578bcf8ba892bfc89d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, masquerading as game hacks and generators. These links lead to further PDFs hosted on `morishita-tc.com.tw`, indicating a chain of malicious lures. The document body, though partially corrupted, contains references to 'Coin Master Free Spins Hack 2021' and includes URLs consistent with the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-hack-2021-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-spins-and-coins_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_003_off00004b6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6D 24560 bytes
SHA-256: 2e8e73b1ec59031b6d59da1cf58c76b23fcee58de6b4568ad6c04e19ff947b7e
font_01_sfnt_off000083d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 18456 bytes
SHA-256: a585848d53eaea1bda4e1de9ee00cb9d2c4270f04f2766c3858066f184342be0

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