PDF malware analysis — malicious · 161fc6e91f9fc1b4

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 21:51:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: c0c5f070732d80a0a9cfdc5dae931a08 SHA-1: 71661d4de4675b433134984864c6727bfc8b3708 SHA-256: 161fc6e91f9fc1b44557955ac694b8d3dcfa34d66e7241c7f6e584cfe1dbf769

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/coin-master-free-spins-1701-20-game-hack PDF link annotation
- https://dolphintour.vn/images/uploadsfiles/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/robux-for-offers_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-rbx-bc-claims-and-generators_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/harked-roblox-script-free_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-jaubreak-hack-script_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-weird_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-brown-free-hair-boy_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/proxy-hack-roblox-download_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/blox-land-free-robux_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
`font_00_sfnt_off00002fe9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FE9	22576 bytes
SHA-256: `f8f81333b6bfa51f0e5017c07bcc40ce598d58026adca8b0276c3f50ca09c11f`
`font_01_sfnt_off00006241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6241	18632 bytes
SHA-256: `86dfee37f156cdce86a3f50d38272fef7e08748399ce5ca6ab81c9de367e2c9a`

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