PDF malware analysis — malicious · af2b9906feda5257

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 06:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 4bb5b4181d744831b18e6ecfe5f0ad2d SHA-1: a9f266cbc4c8516f87994c052000de82274ab814 SHA-256: af2b9906feda525715d367bea258d10b0f677dd2a1c1d9a0c447440e66839682

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the heuristic findings. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack pattern involves redirecting the user to a malicious URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/hack-coin-master-link-game-hack In PDF document text
- https://www.wcauk.org/uploads/files/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/withdraw-robux_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/vip-roblox-free_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/roblox-character-free_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://www.wcauk.org/uploads/files/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000053c3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x53C3	24764 bytes
SHA-256: `d4825a6002b6d1c260e09437c6a0a8431235bc8f9fdce93d25db4c1ac5dbc7a4`
`font_01_sfnt_off00008c65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C65	5044 bytes
SHA-256: `b78cf3b5e17e00e4235d77da9d18ec810ccb7eeb0bc03c54389894c4c7a09054`
`font_02_sfnt_off00009d9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D9B	17716 bytes
SHA-256: `7a2147665fdabc5cddb25f595f31131d5d2283434a8b54cc276e8057d1a6620b`

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