PDF malware analysis — malicious · 0d8b36c0aeb5b159

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 15:16:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 6949e94fa92c5784d701aeff83103f29 SHA-1: 5d189da06a3c471cde71fffb47181bd54c143fcf SHA-256: 0d8b36c0aeb5b159b6fa3917e1f92ac43b3516f9e4978cf1aa3d26416c83de28

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' and an embedded URI pointing to a site offering 'free robux' and game hacks. This indicates the document is designed to trick users into visiting a malicious URL, likely for credential harvesting or further malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/free-robux-rbx-membership-claims-and-generators-game-hack PDF link annotation
- https://www.yantan.com.tw/upload/files/static-moonactive_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/hack-de-juegos-apk-robux-gratis_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/hack-de-roblox-2021-descargar_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/earn-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-god-mode-hack-pastebin_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/roblox-asset-download-for-shirt-template-free_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/arsenal-fly-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.yantan.com.tw/upload/files/lua-script-hack-dinosaur-simulator-roblox_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
`font_00_sfnt_off00002ff7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FF7	22116 bytes
SHA-256: `1a4420dfca0422a13de6c8b993117e90400bc1733541c005dba3a06f4b22fda7`
`font_01_sfnt_off0000610f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x610F	19988 bytes
SHA-256: `03dfe6de8845d3473726eb4030840d608a9a770ef7b8a3a8a712ab223ded599f`

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