PDF malware analysis — malicious · 892f491d0423f44e

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 15:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b4642d28ea1d9893f55ced6f382e204f SHA-1: 18b4b926f184dcd35dc0c3c267d697364239b71c SHA-256: 892f491d0423f44e7b295d778a3a8a08a927c786b2622b345e933b310a6580f0

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 0.9632

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/479516143/classic-minecraft-net-hacks-game-hack PDF link annotation
- https://www.dahu-villa.com.tw/upload/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

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	25404 bytes
SHA-256: `abe8696c9fd8bf9ee09a44f940a4673c686cba8dc97ef50df632bfbb60dff6d8`
`font_01_sfnt_off0000847e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x847E	2968 bytes
SHA-256: `1a6fdb199330243fe0d6ac95369695c8bb937492ff0ee18e67b0417282cd628f`
`font_02_sfnt_off00008ecc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ECC	17812 bytes
SHA-256: `06eb0692cb0ff670c8084f221f19fc536b6b0c4a84b00058b05a05adc7fae17c`

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