PDF malware analysis — malicious · 8596de4a40cd1136

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 09:20:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 63309bc8f5216095f48e51cd642697db SHA-1: e40a26ef7642bef18b6033978ef168c4b544fb71 SHA-256: 8596de4a40cd1136779115e27beb0533a7b68c7c402879633effd61e75786689

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA and game hack lure to trick users into clicking embedded URLs. The primary URL, https://netcdn.online/app/431946152/robux-com-roblox-game-hack, is likely a redirector to a malicious site. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/robux-com-roblox-game-hack PDF link annotation
- https://www.orbai.ai/uploaded_files/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.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_004_off0000521c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x521C	26908 bytes
SHA-256: `1bd0a719c9d31c131983a0e1ab8cdab82f4b50794bcf1524c522bad5deebcc08`
`font_01_sfnt_off0000914f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x914F	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off00009e60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E60	18184 bytes
SHA-256: `f7ab4603df043e3b409a5778cbcaa649af363bace0b439e4e1e45451ac3c723c`

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