PDF malware analysis — malicious · 51791c02b80eef4a

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 06:00:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 2645c0b12bfbd9dc98de660f900afea6 SHA-1: 26546118f1596544a75c292ee96dbfcec8599e8a SHA-256: 51791c02b80eef4a9938c45a2f6cb756dadfb5f3ccad9ec019b211c085821594

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/479516143/get-minecraft-windows-10-free-game-hack PDF link annotation
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-pc-hack_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-hacks-tower-of-hell_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-hack-com-password_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/can-you-hack-robux-in_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-net_GM431946152.pdfIn PDF document text
- https://kultura.orb.ru/uploads/ckfinder/userfiles/files/minecraft-hacks_GM479516143.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_off00003249.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3249	22724 bytes
SHA-256: `d5445f5c2bea7a131af4d440ca5f382ce349940109cbd105e93a17b7ec3b965c`
`font_01_sfnt_off0000651c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x651C	18812 bytes
SHA-256: `611e0fe8ef0e09460557208b470d6bb305c401f6b817a80b09e66ff1eb668ddb`

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