PDF malware analysis — malicious · 203eb854da7b8331

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 03:39:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 1ac8a5b2261023011a8dfd4665b9c146 SHA-1: 3f0d13303b20c7c935c7b57225daf2b624301c65 SHA-256: 203eb854da7b8331d4f240b350718fc37b946db655690cd0a3ce6bd62a9019af

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to "Free Robux" and "game hacks", directly linking to a suspicious URL. This indicates a phishing or scam attempt designed to trick users into visiting a potentially malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious workflow.

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/free-robux-websites-that-actually-work-game-hack PDF link annotation
- https://foc.vn/public/upload/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/try-minecraft-free_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-reedeem-code-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/hacker-flying-in-roblox-game_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-hack-robux-youtube_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-free-robux-offers_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-dentist-game-online-free_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/is-hacking-roblox-legal_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/robux-match_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/cool-free-roblox-hats_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_off00002db6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DB6	22416 bytes
SHA-256: `9c353bcf5f5692a601a3c7a3536e0e6a8fa53a8eb1fd07d287a656fb720a2ed8`
`font_01_sfnt_off00005fc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FC0	19728 bytes
SHA-256: `c48ee832210ee305b2cdd7fb716127036f9f71975271ebe5eb06913399feca35`

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