PDF malware analysis — malicious · 5223ca808985f951

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 14:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 33d6df2d59de5a5de872ebf7464474ca SHA-1: b24fd297c545f013c7998f8828f0efe66b99b888 SHA-256: 5223ca808985f95149b601a128b900b935b8263997c4eb24a5ca771ca759848d

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.tw/app/431946152/free-robux-codes-2021-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/comment-hacker-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/earnrobux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-shirt-codes-free-shipping_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/prison-breaker-roblox-hacks_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-apk-ios_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
`font_00_sfnt_off00003020.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3020	21956 bytes
SHA-256: `3c4ab1b48b31448989b5a54e2bd357a8c8b26dcd457a9c995d328c68a2b4afd7`
`font_01_sfnt_off00006085.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6085	19292 bytes
SHA-256: `a06e109f4742255b3e3bb25118cfd4c6c94882922bdfaa475a115917b157a644`

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