Malicious PDF — malware analysis report

Static analysis result for SHA-256 7416c41367e5a3d2…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 02:57:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2df140980cb204afff7fd3572b79ec71 SHA-1: ef4caac1453ed599f0c1cd60bca9bdab89880850 SHA-256: 7416c41367e5a3d287debe5023d2c8b5bf425a221f599e82e63e33a6441c8abc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a known malicious infrastructure, masquerading as game hacks and generators. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related cheats. The document body, though partially obfuscated, reinforces the theme of game exploits and free currency, aiming to entice users to click the malicious URL.

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.co/app/431946152/is-auto-clicker-cheating-in-roblox-game-hack In PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-exe-editor-cheat-engine_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/is-roblox-free-on-xbox-1_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-the-free-popkon-hat-in-roblox_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/advertizes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-minecraft-for-free-ios_GM479516143.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_off00003111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 21712 bytes
SHA-256: 30482c7b1b5790e1e93f933fb30b688666c28feb4c43f16bb552d04dd7e20e90
font_01_sfnt_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 19188 bytes
SHA-256: 2da0add2b7e3dd1a46420556f66e3ca206db5659d0eec421622778d70f0824e8

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