PDF malware analysis — malicious · 8ad6cd0f34ac8c03

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 19:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c811b8bb80319baf6041f7f184d20eb8 SHA-1: d742f9783a8315f1965aa761ba3499f19a655ad5 SHA-256: 8ad6cd0f34ac8c03d05e5ad28b11713e472440a696b2c8b41865c9bf07792e19

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/free-robux-no-verification-game-hack. This lure is designed to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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-no-verification-game-hack PDF link annotation
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-minecraft-domain_GM479516143.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-hack-on-robux_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-hacking-admin-house_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-hacker-outfit_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/comment-hacker-roblox-sur-pc-sans-atraper-de-virus_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://www.laksanatravel.com/ckfinder/userfiles/files/roblox-robux-hack-generator_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_off0000306f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x306F	22280 bytes
SHA-256: `beaabf950fa8d515e27a50db7421388f0296f2aa8637e9d3d60c22d7cddf74ab`
`font_01_sfnt_off00006229.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6229	19072 bytes
SHA-256: `ace71d10471f941b47a74757ee9bffc2eb087028e16fd0b67ae59ecc13578840`

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