PDF malware analysis — malicious · b3e3425104fe31f8

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 19:09:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 4c9e90befa4b9773b25ee0321f35ab81 SHA-1: 22ca5db41b3a77771869c11c76d60f145bd2c5e3 SHA-256: b3e3425104fe31f8cd12a5d647cc548aae3dec288ad98225f4e36e15afd0131b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/431946152/rbx-land-free-robux-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-hacked-game-database_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/speed-hack-download-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-online-roblox-login_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robuxian-hack-to-steal-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robloxcom-hack-download_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-google-chrome_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-hack-gui-download_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-builders-club-roblox-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-math-games-online-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-coin-master-2021-hack_GM406889139.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_off00002dab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DAB	22244 bytes
SHA-256: `bb6ce2998abd5710589c41f325f6ffea328d48993391fe52e1832d303a4e00ce`
`font_01_sfnt_off00005efe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EFE	18888 bytes
SHA-256: `4817daf99d7be6acb7e085ade210037e4f4d39e99fb734b610a789fe26adf34b`

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