PDF malware analysis — malicious · cceedbe6573216b9

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 08:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 38817cf0b235d33d7e8e049406f14aea SHA-1: 4d9e4cf2967bb1b9671d56c20f01864bd61738ff SHA-256: cceedbe6573216b9d89394ddd575a6d8153f75b59fbac6e6f3be7adca9c87c92

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as generators for game hacks and rewards. The primary lure is the promise of 'Coin Master Free Rewards Link', directing users to http://netcdn.tw/app/406889139/coin-master-free-rewards-link-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely intended to lead users to a malicious site that could download further malware or steal credentials.

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-free-rewards-link-game-hack In PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-to-hack-roblox-for-robux-201_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/roblox-hack-to-get-free-robux-youtube-voltexx_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/robux-hacks-easy_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-likes-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-pet-code-bubble-gum-simulator-roblox_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
- https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-java-for-free_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_off000031a7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31A7	23220 bytes
SHA-256: `b04ce535defcd609275e055bf7168f57cd4d54c26542f5a20c19a3c15d6b760e`
`font_01_sfnt_off00006613.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6613	18508 bytes
SHA-256: `14f3d66ef4155d674bf5c841ced46b6496567c39ab5cc62ee63c8c990417a04c`

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