PDF malware analysis — malicious · 1f90b960a377873d

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 11:21:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 127a52d53c45bf8f9b2a66eb7433b50a SHA-1: 98250216da7a8ee337664ad1fd4a41fb12f9449d SHA-256: 1f90b960a377873ddd0cc6839536749085ff28e2166403cf5f959f81eaa5bea9

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/roblox-free-robux-com-game-hack PDF link annotation
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/robux-website_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-counter-blox-hack-script-2021_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-tiktok-video_GM835599320.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/get-robux_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft_GM479516143.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-promo-codes-robux_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_off00003069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3069	22444 bytes
SHA-256: `6bfa030216a98e1abc6cd5d66bac4a123c680b0d7fa3fc1c1b27456a8f16d924`
`font_01_sfnt_off000062cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62CB	19052 bytes
SHA-256: `3ade0644b03576c953d7fa07027ec2051297089046835a88cadcb08e5c593426`

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