PDF malware analysis — malicious · 71649532b9b2a763

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 08:01:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 12256d9d2ad0a86995efb3b06d01de8b SHA-1: da856073faaa99392937e4d534625d6eaba02068 SHA-256: 71649532b9b2a763f77a250ae7d9a98a9cedafd08fca57a312ee6b0481b80c8f

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-card-collection-hack-2021-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/get-free-robux-on-roblox-cheat_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-no-apps-needed_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/tablet-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/cool-roblox-high-school-cheats_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-free-robux-claimer_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/real-free-robux-games_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-free-micky-mouse-clothes_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-roblox-game-clones_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-hack-that-really-works_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/instantrobux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-roblox-hacks-pc_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-egg-farm-simulator-comment-obtenir-des-oeufs-noirs-cheat_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-hack-that-makes-you-turn-into-flying_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/dailyrobux_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_off0000303b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x303B	22076 bytes
SHA-256: `49579e1858bdb31f8d26987a9c83ec15c811587d615da7d4a9bc99a4e57bfcd1`
`font_01_sfnt_off00006119.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6119	18656 bytes
SHA-256: `ebe79e675d69cfb0b5c6058c2d9c6cc85a84d65455e0e2e2977962306b94f3cc`

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