PDF malware analysis — malicious · 1b3b9579514e9e4e

MALICIOUS

PDF

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

MD5: 9502bf015c1d3b0ef24fb18a7b8d65eb SHA-1: 6b9d805ca1a89e310fac2c5b8b8dcbbf4ba5045b SHA-256: 1b3b9579514e9e4ea3e68254ca5b41b1fc605acaa3b476c792e10ea94718f5db

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.co/app/431946152/free-robux-generator-2021-game-hack PDF link annotation
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-fake-cheat_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-unlimited-robux-generator_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
- https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.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_off00003208.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3208	22680 bytes
SHA-256: `d228f1ffb49365b671dfd8e66c1c4d8d8b5de43036e6bfd292a2f7d0f434dd85`
`font_01_sfnt_off000064ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64AE	19224 bytes
SHA-256: `e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a`

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