PDF malware analysis — malicious · df2518575d453376

MALICIOUS

PDF

34.1 KB Created: 2021-07-07 00:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 9503b13cc6a89db7bfb70db3401aabd4 SHA-1: 9ee4ca128ac12fdaaa5e43a26b2d84cc7a62abb8 SHA-256: df2518575d4533768d4a88fd22b7de8ea64a8f7b33ac68a7fe1e3c8fb8b027f1

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/406889139/ios-coin-master-hack-game-hack PDF link annotation
- https://www.dahu-villa.com.tw/upload/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/god-hack-on-roblox-with-check-cashed_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-robux-works-no-surveys-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-spins-from-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/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-boxing-sim-hacks_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/how-to-free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-auto-clicker-for-roblox-ios_GM431946152.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
- https://www.dahu-villa.com.tw/upload/files/free-minecraft-accounts-reddit_GM479516143.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_002_off000030b1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x30B1	22740 bytes
SHA-256: `9f46d4fe590995c3ad9222f19d395001c0586239d0e8d577df52351aa97c3565`
`font_01_sfnt_off00006380.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6380	18004 bytes
SHA-256: `1dea32a01bfce18b325b33ca5688a8bef39c34a40412565ca8fc8a7bb5032574`

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