PDF malware analysis — malicious · 8c74b70333418dc0

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 20:47:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d055b4a64423cee41d8c77f1496c4812 SHA-1: 1400c399a85e73e1f949f3c409af3963bcd875c2 SHA-256: 8c74b70333418dc08f6e3cb1ba97b41c2ca823dcd86e2e40db2e07d3f9a3387b

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or download prompt to trick the user into clicking a link. The primary external URI found, https://netcdn.xyz/app/835599320/free-tiktok-followers-game-hack, is likely the destination for this lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

Heuristics 4

Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/835599320/free-tiktok-followers-game-hack
- https://corbo.ru/images/7-year-old-roblox_GM431946152.pdf
- https://corbo.ru/images/what-tiktok-free-like_GM835599320.pdf
- https://corbo.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
- https://corbo.ru/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
- https://corbo.ru/images/free-robux-no-verify_GM431946152.pdf
- https://corbo.ru/images/play-coin-master-for-free_GM406889139.pdf
- https://corbo.ru/images/free-minecraft-svg-cutting-files_GM479516143.pdf
- https://corbo.ru/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
- https://corbo.ru/images/minecraft-svg-images-free_GM479516143.pdf
- https://corbo.ru/images/hacks-for-coin-master-game_GM406889139.pdf
- https://corbo.ru/images/easy-robux-today_GM431946152.pdf
- https://corbo.ru/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdf
- https://corbo.ru/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
- https://corbo.ru/images/free-spin-coin-master-app-download_GM406889139.pdf
- https://corbo.ru/images/moonactive-coin-master-hack_GM406889139.pdf
- https://corbo.ru/images/roblox-gift-card-for-free_GM431946152.pdf
- https://corbo.ru/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdf
- https://corbo.ru/images/coin-master-hack-spin-link_GM406889139.pdf
- https://corbo.ru/images/coin-master-free-spins-link-2021_GM406889139.pdf
- https://corbo.ru/images/how-to-get-roblox-credit-for-free_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000045f8.bin` `bfa146a265dbf926f674bfabd2c26a9f544dbbf598b4fcfed6648ce91cf70b2c`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x45F8	24572 bytes
`font_01_sfnt_off00007e49.bin` `56ee3cf210babcab1d595ec3cc7d666f7a646b8ea00ab1e6563ebd84f84582f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E49	3000 bytes
`font_02_sfnt_off000088a9.bin` `ba2215a0f2290c6faad19fe6968ba231152e54b1cb241ca137cf69db350684c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88A9	17692 bytes

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