PDF malware analysis — malicious · 6b88a764652e1378

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 17:19:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3549392aa43668dee46f82c6bea3ada0 SHA-1: dbf045d67fcc2fec80a0fdd8a9928e30bfdceb10 SHA-256: 6b88a764652e137803ece58f18d1230269fbc42234a6838e2f63cf99025e1e0b

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/431946152/freerobuxhack-us-2021-game-hack PDF link annotation
- https://cosmosocean.com.tw/upload/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-axe-in-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-admin-group-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-scripts-for-roblox-exploit_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-retail-tycoon-116-ifinite-money-hack_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-theme-park-tycoon-2-money-hack_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-hack-roblox-accounts-july-2021_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-robux-generator-2021-working-downalod-no-downlaod-oddsfuspanish-translate_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/800-robux-for-free-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/quelqun-me-hack-sur-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-galaxy-wings-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-know-if-you-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-hack-dumb-brothers-roblox-accounts_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-no-verification_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_off00003299.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3299	23144 bytes
SHA-256: `2f2c20bc322a44515c754db5fc76e85b283c9170691cd198e3976e8ce020f14e`
`font_01_sfnt_off000066f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66F0	19452 bytes
SHA-256: `43b81a284332bbcce6e172d110dbc1a63e46633337d5d3ab3430c81f8a1ab5e6`

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