PDF malware analysis — malicious · a281273c3487ba68

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 07:21:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 68a2cfc25033043167ec435decab4d34 SHA-1: fe5d7d90b1d3c98d1b8a940d524c35c4e147ecf1 SHA-256: a281273c3487ba683b5fb78248c59ab513b59854b7fa7e5cd7e3dde2d2226467

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/minecraft-net-free-game-hack PDF link annotation
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/hacking-guide-roblox_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/picture-roblox_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-admin-roblox-hack_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-roblox-gift-card-giveway_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/pastebin-roblox-robux-free-2021_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/infinte-jump-hack-roblox_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/overblox-cheats-roblox_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-csgo-skins-roblox-id_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-roblox-account-username-and-password-2021_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_off000032e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32E4	22744 bytes
SHA-256: `c14a6b5ae016ee456c2b3a785f3980a203ec5df3e9c1d6b02a83dbfe1c966916`
`font_01_sfnt_off00006561.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6561	17856 bytes
SHA-256: `6898a530d076d41ebdbfd9cf57f4f0427e348e488e3bb44a381b543b62f11fc6`

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