PDF malware analysis — malicious · 440ad8bbac62c094

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 16:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: fcffdae318f55827122d06fa2c097edb SHA-1: 80fb05ed6bba292b57af38f846e90b46afd82097 SHA-256: 440ad8bbac62c094ffa4f92574aff01c1450a8d172d361b887394fe221409df4

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 0.9971

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/406889139/coin-master-daily-free-spins-25-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/robux-free-c_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/rbxdemon_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/body-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/www-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-to-play-minecraft-servers_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_003_off00004a3e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A3E	25320 bytes
SHA-256: `af73044f3925f4ac299ca5b1b48e01704d55cfce3adfa0e5991478750e2ffc6e`
`font_01_sfnt_off000083f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83F0	18568 bytes
SHA-256: `b4b281bb5b6dfe092bf3b90adf491610ab408f1d3fe0f6ae1605b441ac4007a5`

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