PDF malware analysis — malicious · 17230ef98f8f6d53

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 12:18:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: bb26fb221d08714aedf1feef4d2bdf8f SHA-1: 1b42d8b1c6557f42513e5f3e0ac12ceabdf2b323 SHA-256: 17230ef98f8f6d53630caf9fbd9c5cd068ba35d42b283f1b5fef3dab5fcf4ca2

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/roblox-apocalypse-rising-hack-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/wurst-115_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/robux-premium_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/anti-speed-hack-script-undetected-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-co_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/tiktok-free-followers-and-likes-apk_GM835599320.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-hack-item-free_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-by-joining-groups_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-hack-download_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_off00002e05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E05	21924 bytes
SHA-256: `dbfa09327fbfd2c9b09caf5182eae442dce246ac1350877e46f6c5b6a7b8188d`
`font_01_sfnt_off00005ebc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EBC	19132 bytes
SHA-256: `89b3c6f78ad9a233c40c5814635efca93e06110ce3843f8feb3308563d35be6a`

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