PDF malware analysis — malicious · 76bf31f94b72a4fa

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 06:58:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8e5eaaa290e8c97bd8c94d948afbff57 SHA-1: 16225f764827791606ec1c894515dd4a4c1a40a3 SHA-256: 76bf31f94b72a4fa68e7276c2fa46fd30f56dfdc78e6a0170eb0500857929fa7

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/roblox-robux-hack-no-survey-no-password-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-games_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-jailbreak-money-hack-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-link-today_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-village-4_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/hack-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-codes-9-3-19_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/best-free-admin-games-in-roblox_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_off0000316b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x316B	22344 bytes
SHA-256: `f9cd106b8a916198026837b6fd502f9311de158e8641713bf19b221852049f21`
`font_01_sfnt_off00006342.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6342	19584 bytes
SHA-256: `f5e0a80dbdfc1403cdf7914d617e2cf14657673b80c191b5595d4caaafeee0e0`

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