PDF malware analysis — malicious · bd8f6dbcd462ca92

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 07:44:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 93b99799083f448b5bb4c4c54498f9ca SHA-1: 07440f0f7dcc803461bc39cbb718ff7c755e94fc SHA-256: bd8f6dbcd462ca92dafda9014aafc13ecbf5b1ec46848a3efd93831fbba6d4e6

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/406889139/best-free-coin-master-spins-game-hack PDF link annotation
- https://foc.vn/public/upload/files/youtube-free-robux-obby_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/robux-match_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/15-robux-free_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-free-robux-20219_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/c-face-get-for-free-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/ash-greninja-free-shopping-in-roblox-on-robloxshopping_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-roblox-gear_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/roblox-all-free-items-2021-userscript_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
- https://foc.vn/public/upload/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
- https://foc.vn/public/upload/files/youtube-roblox-free-cops_GM431946152.pdfIn PDF document text
- https://foc.vn/public/upload/files/free-exploits-roblox-reddit_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
`stream_002_off00003143.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3143	23052 bytes
SHA-256: `59c0dbc02e4619073e87d3e4cf9ad48a72812d1890af659e9e6a799135c30bf6`
`font_01_sfnt_off00006511.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6511	18388 bytes
SHA-256: `281461e4fd7c5443b837ceedda0924bd791c359b257ced4fc43d271c93f5a952`

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