PDF malware analysis — malicious · 2b600335a9022329

MALICIOUS

PDF

35.3 KB Created: 2021-07-10 02:37:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17

MD5: 8297a648aed87d15885152d18a045923 SHA-1: b9c828ec296c845bb2ae19423c7be6fc1a033877 SHA-256: 2b600335a9022329255bc6a63a202968022b979b8b0a08fb925c30b9d7a60cc8

160 Risk Score

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/free-spin-in-coin-master-game-hack In PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-get-boombox-free-cheat_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-trolling-with-hacks_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-codes-2021-not-used-no-verification_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-item-generator-hack-that-game_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-the-big-hack_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/blox-world-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.

Filename	Kind	Source	Size
`stream_002_off00003382.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3382	23232 bytes
SHA-256: `2d95adf9b8c5afa0d91e0e6e06e5a8533326114f6ed9040edad9d2352701a43c`
`font_01_sfnt_off000067d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67D2	18176 bytes
SHA-256: `71b70257de5307608e837e84baf22dba423b8b66b5dab801bbeeadacf24eb5d5`

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