PDF malware analysis — malicious · cc4b18e460458d97

MALICIOUS

PDF

35.7 KB Created: 2021-06-28 15:57:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: bedec46d14343930de95b35c232e2b10 SHA-1: f6817d394eb499e09faec469452b08d91d47144f SHA-256: cc4b18e460458d97bcbffe475fc5a99231cf71ce0a70d6ca51d97e2cf68ded61

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free in-game items and cheats for popular games, likely as a lure. The presence of a large number of external links, many with numeric slugs and long titles, suggests a link farm designed to attract users searching for these terms. The ML classifier strongly indicated maliciousness, and the overall structure points to a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/how-to-open-cheat-engine-in-roblox-2021-game-hack PDF link annotation
- https://linhkien247.vn/public/upload/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/roblox-catalog-free-items-2021_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/roblox-promocodes-with-free-robux_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-gifts_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-get-free-funds-on-roblox_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/free-roblox-generator_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/how-to-hack-in-comedy-club-roblox-to-go-first_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/hackerlol-roblox_GM431946152.pdfIn PDF document text
- https://linhkien247.vn/public/upload/files/coin-master-free-spins-for-today_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_off000030dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30DC	22912 bytes
SHA-256: `f8d2ff35d03193bc1b5612be7960a3c9b038ad131f6bc3b8e5eddd0bf5075dc8`
`font_01_sfnt_off000064ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64BA	19616 bytes
SHA-256: `8ea8627db45b77dd1cfed8e8345ea4a147a52f5f3e612bd0afa8b65d9644deb5`

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