PDF malware analysis — malicious · 9aa29622b41290a0

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 15:13:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: f1d54838ca56df14840231dc667adcf4 SHA-1: 4ed13b638580bbe2a8ca99345e5a6a667c098f20 SHA-256: 9aa29622b41290a0c4e1de62aa944b38c7245d5365536bd78923cebdb52ac355

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 0.9769

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 https://netcdn.online/app/431946152/robux-gratis-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/getrobux-come_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-rewards_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-hacks-no-verification_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_off00005100.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5100	25156 bytes
SHA-256: `3906ea575de5892b1b4b75c0cad6546e3c42e0225722eefd239c5e3179f0f407`
`font_01_sfnt_off000088a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88A5	3984 bytes
SHA-256: `877ad4b302dfb6b98055f7aac9b2af92478449d0c84ea9426916e697f155056e`
`font_02_sfnt_off000095c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95C3	18300 bytes
SHA-256: `5b7956b367e7034c1d89c4bcafd3a8b19a23372aa7741d4527a1b7b8c092ce2f`

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