PDF malware analysis — malicious · 834192e3c76036e6

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 19:36:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: c628a1297d4304e2e03b29c19a30ceb6 SHA-1: e3516eb3dcb4ff5e7dc5f6c42e3426d62a613830 SHA-256: 834192e3c76036e6d5071267bb3cec2463634777e4d7727f7c4f6aa9cda684bb

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 0.9971

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/coinmaster-twitter-game-hack PDF link annotation
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-mod_GM431946152.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
- http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-free-robux-2021_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
`stream_003_off00004cd2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CD2	24768 bytes
SHA-256: `9233948ebac26f26c739336a0f81f3419e9e8e6eacd654e12c51bc19c9b9d2c6`
`font_01_sfnt_off000085e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85E1	17968 bytes
SHA-256: `a7d3fffb70a4648b1058189e3765bccd454023bd20bb72441abfe005f4b328a8`

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