PDF malware analysis — malicious · a4f2e1b7d8fcf2ec

MALICIOUS

PDF

47.0 KB Created: 2021-05-15 13:05:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ff009caf7dac41e4c04dcb66a7f13711 SHA-1: 03efd7815816f15a9c9ab666f826c4b12c674695 SHA-256: a4f2e1b7d8fcf2ec6bd2d89887c9b653cfd9568cf8aa3701c85155d01b842de1

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, which is a common social engineering tactic. The document body, though heavily obfuscated, contains text related to 'Free Robux Gift Card Generator' and a URL pointing to a similar theme. This suggests the document is designed to trick users into visiting a malicious site or downloading a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/free-robux-gift-card-generator-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-earn_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-roblox-characters_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-people-girl_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/code-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-whatsapp-link_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
`font_00_sfnt_off000047cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47CD	28948 bytes
SHA-256: `0645c272c318118ef59a43b0b839c4e1a6c93c9a8b16e65c746aaf1b20569467`
`font_01_sfnt_off000087f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87F5	3464 bytes
SHA-256: `8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20`
`font_02_sfnt_off0000942b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x942B	18640 bytes
SHA-256: `9c31dcaac4a0b50b5f0fc2170f059f54bc5506f6c6606d446db32e5f0aacf3a6`

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