PDF malware analysis — malicious · 4237b27d3f63b5e4

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 19:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: e23ebe871f178cdea27ec79bfbdd6acc SHA-1: d1738ebdb6b5712a309eb087a7b201437d085317 SHA-256: 4237b27d3f63b5e46058b80e1569be610ebfc1632e4c908d3dcd0431dcf9f7ba

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 0.9969

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/406889139/coin-master-rare-cards-hack-game-hack PDF link annotation
- https://diendientuvn.com/public/upload/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-claim-spins_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/free-download-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
- https://diendientuvn.com/public/upload/files/coin-master-free-spins-deutsch-download-ios-link_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
`stream_003_off00004cc6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CC6	27092 bytes
SHA-256: `353c038dedf7bd37b2e28daeab8e501f9615325f6c8bce4d444ed0c075b139fc`
`font_01_sfnt_off00008b10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B10	17888 bytes
SHA-256: `3bcd7f88e9aff6a3f00dfa05e6d37dfcb1a17a5992fabfc54377b1f82d15f42c`

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