PDF malware analysis — malicious · 3ae33867cc303a03

MALICIOUS

PDF

44.6 KB Created: 2021-05-13 12:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3321521dd86b55c5a72e2169f9cf3b6d SHA-1: 48e8d3cbdf5367776924d2effcfd9cd4371cf879 SHA-256: 3ae33867cc303a03201de2e132e648df23607dca849bc2a61b025d228460db12

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9632

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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-email-free-spins-game-hack PDF link annotation
- https://ghevanphongdep.vn/public/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/village-coin_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
- https://ghevanphongdep.vn/public/upload/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004960.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4960	24816 bytes
SHA-256: `908c9d683bc895a253094c8b4c63e651e7d22b8093a3c1f23935b03aba00ac45`
`font_01_sfnt_off00008249.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8249	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008c34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C34	18220 bytes
SHA-256: `6abc40c27418d042928f00883f7f6ae445038055fc973b4cc9155520e44fc93a`

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