PDF malware analysis — malicious · 62eb756b032518bb

MALICIOUS

PDF

43.7 KB Created: 2021-05-13 10:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 93977473ed85b56d8d908703b303a2e6 SHA-1: 5452e07b7cbfccbd40d24609175a1ae5e8d60104 SHA-256: 62eb756b032518bb4b92a358b74e87fd13822254c5312885da445736d18a7bd5

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF that displays a fake CAPTCHA to trick users into clicking a link, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The embedded URL 'https://netcdn.xyz/app/431946152/how-can-u-get-free-robux-game-hack' likely leads to a malicious download or further compromise. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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/431946152/how-can-u-get-free-robux-game-hack
- https://tokunfome.com.br/images/my-robux_GM431946152.pdf
- https://tokunfome.com.br/images/how-to-free-robux_GM431946152.pdf
- https://tokunfome.com.br/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
- https://tokunfome.com.br/images/minecraft-java-account-free_GM479516143.pdf
- https://tokunfome.com.br/images/coin-master-free-coins-and-spins_GM406889139.pdf
- https://tokunfome.com.br/images/how-to-hack-a-roblox-account-easy_GM431946152.pdf
- https://tokunfome.com.br/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
- https://tokunfome.com.br/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
- https://tokunfome.com.br/images/coin-master-free-spins-apple_GM406889139.pdf
- https://tokunfome.com.br/images/roblox-website-robux_GM431946152.pdf
- https://tokunfome.com.br/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdf
- https://tokunfome.com.br/images/robux-money_GM431946152.pdf
- https://tokunfome.com.br/images/coin-master-free-coins-and-spins-app_GM406889139.pdf
- https://tokunfome.com.br/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdf
- https://tokunfome.com.br/images/roblox-but_GM431946152.pdf
- https://tokunfome.com.br/images/how-can-i-get-robux_GM431946152.pdf
- https://tokunfome.com.br/images/robloxmatchcom-free-robux_GM431946152.pdf
- https://tokunfome.com.br/images/robux-today_GM431946152.pdf
- https://tokunfome.com.br/images/coin-master-hack-spins-app_GM406889139.pdf
- https://tokunfome.com.br/images/roblox-robux_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b70.bin` `f89953b8c406dd9817602d8605c9886802188f0df7d124fb236291f5b03f1afd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B70	26256 bytes
`font_01_sfnt_off0000870d.bin` `6d387a6157482ae5d4424ea2a1b018d5f079fe6dbc45eeb2149446a5bd008250`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x870D	18696 bytes

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