PDF malware analysis — malicious · 6559835e6bfcdc03

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 11:55:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 3ceac75ca65a30118dcf1eb9dd037138 SHA-1: abc2ed3b2a8189da261ccb55fff82371ea5fc8b0 SHA-256: 6559835e6bfcdc038e77d520e8e73e832c5e11bc757efb08c8425a8e95b30882

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 0.9969

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 https://netcdn.xyz/app/431946152/free-robux-without-human-verification-real-game-hack PDF link annotation
- https://www.ruchya.com.tw/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-comroblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-stream_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-twitter_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-coins-and-spins-coin-master_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_off00004686.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4686	26524 bytes
SHA-256: `b146ef7bcceca30b43bf14071d4fcc7b7db0c908fe5179c9539680fa64abb96f`
`font_01_sfnt_off0000843f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x843F	19296 bytes
SHA-256: `fcd37aae12381262441149b3f055c838aea0a99c045645b338d4096dcdd54a9c`

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