PDF malware analysis — malicious · 91516bcd62d7e9bf

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 00:20:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: d82e6ca2ce69c14a505518da50387eb9 SHA-1: e60a56d6c9127557a6530f36a01f13af77d0a3c8 SHA-256: 91516bcd62d7e9bf43a4bfe8acfdf8b53f76280b7957dc87ac517bb8c0109a3c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.co/app/431946152/comment-hacker-roblox-game-hack. This lure is designed to trick users into downloading potentially malicious content or visiting a phishing site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a social engineering attack.

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/comment-hacker-roblox-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/roblox-life-ii-hacks-how-to-get-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-hack-aimbot-download_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-com_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-gfames-that-dont-take-password_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/snippet-hack-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-cheat-on-roblox-tycoons_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-items-site_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robux-how-to-make-a-promo-code-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hacks-para-roblox-gratis_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_off00002f09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F09	22144 bytes
SHA-256: `1541bd5933d2aa53386cae5bb3cfab7e5843c5f0c74338e23a8c075040fafd44`
`font_01_sfnt_off0000602f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x602F	19020 bytes
SHA-256: `08ca425d72d757ea21cd37986752ba42a2c251875acf5abb2fa61a6e76e1ecad`

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