PDF malware analysis — malicious · 7151b8978e7e8b63

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 06:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 17c1ddfe326d76ae9981237ad530bef9 SHA-1: 92887a502332b996f428bfd3792cc43d62b0e33c SHA-256: 7151b8978e7e8b63b38915bcf3ad8bdb2cc9dc1a521e2e3f5ad62932824ad5b3

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/www-free-robux-game-hack PDF link annotation
- https://www.ruchya.com.tw/upload/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/play-coin-master_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-scam_GM431946152.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/roblox-skin-free_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_003_off00004a61.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A61	26620 bytes
SHA-256: `4c8c7d43590207b195c4bd02042380a33c888c0b50d8bbe858b2509bd3d1db4b`
`font_01_sfnt_off00008691.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8691	18376 bytes
SHA-256: `3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a`

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