PDF malware analysis — malicious · 2fb44b05f58e3f35

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 11:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: af35a307ae866a28df336854d202a976 SHA-1: fd842244b4d88a93c83843973cc4e97cd42e51d1 SHA-256: 2fb44b05f58e3f355b2b63412b32f69d4a5b4fd56b5e495b52c8ae0146ca4cd7

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 0.9648

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.xyz/app/406889139/free-coin-master-spins-and-coins-game-hack PDF link annotation
- https://linhkien247.vn/public/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-mobile_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-free-spins-and-coins-app-download_GM406889139.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
`font_00_sfnt_off00004a4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4A4E	24608 bytes
SHA-256: `5066dba201669279126dee18c0964337b61b058952c2ee46abde960e35361694`
`font_01_sfnt_off000080b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80B1	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008a9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A9C	18060 bytes
SHA-256: `55f53c4f18bfaf59a8fbb6d381f980c96a3f4ad908aa3278e43a985984e68094`

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