PDF malware analysis — malicious · 7a57f8d5dcaa3794

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 00:48:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 58ca9507a46a97ec1d45194c85e27d69 SHA-1: 4e7f3bbbb2d76912dcd376cf73d69935659a0591 SHA-256: 7a57f8d5dcaa37941f166c831cca9974b5574fe0f33a394b71543ed4aaa447c1

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.co/app/431946152/roblox-rhythm-track-hack-game-hack PDF link annotation
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-execute-localscripts-on-roblox-hack_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/minecraft-tools_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-call-roblox-and-get-free-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/longshot-roblox-hacks_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-mobile_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_off00002e57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E57	22032 bytes
SHA-256: `902c203d217737e5d81c8a7895b7967c4a1a5f2c26545f7dab77ea62b731f8f1`
`font_01_sfnt_off00005f1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F1C	19368 bytes
SHA-256: `0b3bd5538a2afc7a1a891214eaca6123f6b7f9d5c7a54610ab2994b487d71595`

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