PDF malware analysis — malicious · 3ff3beb8497d1cc0

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 09:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 9d8411264157b5f28fdce8d775d82c52 SHA-1: 2659cc964ac28dc6ffdd27f5763c8498f21bc60b SHA-256: 3ff3beb8497d1cc0e0e5cfc0d394f1ffef925464e7015536637b5ec300fa26af

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/info-roblox-com-robux-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/free-robux-without-human-verification-on-android_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-hack-stealing-items_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-roebucks-com_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-royale-high-free-vip-server_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/robux-free-hack-2021-agust_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-codes-free-for-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/money-hack-roblox-sunset-city_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-jailbreak-hacks-for-mac-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hack-roblox-download_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/what-would-noobs-do-with-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-roblox-executor-synapse_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-cheat-free_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_off000031eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31EB	22588 bytes
SHA-256: `87600d1d3c3a1aec874b68af9ff4bc476689cd40ce4d07b58953544ddeb090b7`
`font_01_sfnt_off0000647f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x647F	18884 bytes
SHA-256: `33869e0793667af56f7d6ba87793124f619ba1ae35730a4dd1e79e07104d3564`

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