PDF malware analysis — malicious · b4d0c2004d5dbedf

MALICIOUS

PDF

55.0 KB Created: 2021-06-03 15:06:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: ab2b55a8af5dcd3eb0de537152331b97 SHA-1: 11a6edea1a5bd0792c104957e3864a47fcf97a81 SHA-256: b4d0c2004d5dbedf67ccc945cbb0cc0103c9e403c9eda719eed11210cd43e0fe

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 0.9699

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/free-draw-roblox-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/rewardrobux-com_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005251.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5251	26288 bytes
SHA-256: `20ee95c32dcb083bd35ab20e8410c47c44d63aaf22227542711242bb10351878`
`font_01_sfnt_off00008e70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E70	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009b12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B12	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000a819.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA819	3120 bytes
SHA-256: `49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca`
`font_04_sfnt_off0000b32d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB32D	18508 bytes
SHA-256: `f910b5e05dc090141321478ad8f2371d3108a4bfaceab19230c4d52c6f4382ac`

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