PDF malware analysis — malicious · d6382d2917e8aabc

MALICIOUS

PDF

35.6 KB Created: 2021-07-07 00:50:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: bb2ce3125f024fbba519bddca572ea5b SHA-1: b60870776cf8252bf051b00ca8df57c2f57f6ca7 SHA-256: d6382d2917e8aabce4e3d430e42b5e7fcd4ab74e9db708372c6b0066ffa04e34

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to the URL http://netcdn.tw/app/406889139/coin-master-free-spin-link-today-2021-game-hack. This URL is associated with a high-severity heuristic firing for a game hack redirector. The ML classifier also flagged the PDF as malicious with high confidence. The document body text confirms the lure by mentioning 'Coin Master Free Spin Link Today 2021'.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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-free-spin-link-today-2021-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/oprewards-com-login_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/serveur-discord-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/script-for-have-gamepass-free-roblox-pastebin_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/robux-generator-no-human-verification-or-survey-roblox-hack-tool_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-group-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-free-login_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/cheat-script-roblox_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/cheat-roblox-one-piece-millenium_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/roblox-games-that-give-free-radio_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-minecraft-mods-for-ps4_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.

Filename	Kind	Source	Size
`stream_002_off00003185.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3185	23248 bytes
SHA-256: `54b7369a4626810bba1027b1ca408858ef9dce3f3eed964241e34f166c323f5c`
`font_01_sfnt_off000065be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65BE	19100 bytes
SHA-256: `87948dd456158924639af78db2b6f448ba4bec773812a2cc2fa62bc058a3e5dd`

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