PDF malware analysis — malicious · 96ec1223b41d0168

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 16:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 8b4f0d2f1ad719ed26757aae5984338b SHA-1: 7f4d6bf2bb34ccd6820e66f34e84345673509d1b SHA-256: 96ec1223b41d01684ced978cae1646722395827aed815bc9acdd3049ee09c43a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents itself as a 'Free Robux Generator' and displays a fake CAPTCHA to trick the user into interacting with a malicious link. The embedded URL and numerous other URLs within the document body point to sites offering game-related cheats and hacks, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a fake verification prompt to drive clicks to external malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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 http://netcdn.co/app/431946152/free-robux-generator-2021-december-game-hack PDF link annotation
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/chamello-free-robux_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-jaubreak-hack-script-auto-rob_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-earn_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/pokemon-go-free-qr-code_GM1094591345.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-superhero-simulator-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/robloxhacks_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-make-a-group-on-roblox-for-free_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_off000030a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A6	21928 bytes
SHA-256: `666f63a3fc6557a0f7ed23a021b013e73fe14c359f1f7986235a07bfcf1402f1`
`font_01_sfnt_off00006173.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6173	19652 bytes
SHA-256: `abc88391fed0f289c91fd0ae3255cb037a796e1ffa76c866578d4ff82c7ee5fe`

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