PDF malware analysis — malicious · 1c28861ad44f28c0

MALICIOUS

PDF

48.8 KB Created: 2021-06-09 03:28:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d55fea060a5e170cb78de34a31e1efb8 SHA-1: 94f734b12272b65e2d5478523ec63e1fa845e986 SHA-256: 1c28861ad44f28c0f2502875614d9b40890a502308e802fa8e795eb92e989a70

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA lure to trick the user into interacting with embedded links, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and multiple external URLs were found, suggesting a download or redirection attempt. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to exploit user interaction.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/whats-a-code-for-roblox-to-get-free-robux-game-hack
- http://axiapublishers.com/images/coin-master-hack-pro-gamers_GM406889139.pdf
- http://axiapublishers.com/images/tiktok-free-real-followers_GM835599320.pdf
- http://axiapublishers.com/images/roblox-free-robux-hack_GM431946152.pdf
- http://axiapublishers.com/images/robux-gift-card-free_GM431946152.pdf
- http://axiapublishers.com/images/easy-coin-master-hack-without-verification_GM406889139.pdf
- http://axiapublishers.com/images/minecraft-download-free-download_GM479516143.pdf
- http://axiapublishers.com/images/coin-master-free-spins-instagram_GM406889139.pdf
- http://axiapublishers.com/images/earn-free-robux_GM431946152.pdf
- http://axiapublishers.com/images/robux-for-kids_GM431946152.pdf
- http://axiapublishers.com/images/rbx-free-robux_GM431946152.pdf
- http://axiapublishers.com/images/coin-master-hack-version-2021-download_GM406889139.pdf
- http://axiapublishers.com/images/coinmaster-spin-ml_GM406889139.pdf
- http://axiapublishers.com/images/roblox-hacks-2021_GM431946152.pdf
- http://axiapublishers.com/images/robux-free-online_GM431946152.pdf
- http://axiapublishers.com/images/atticus129-roblox-hacked-image_GM431946152.pdf
- http://axiapublishers.com/images/coin-master-free-spins-cheat_GM406889139.pdf
- http://axiapublishers.com/images/free-coins-coin-master-link_GM406889139.pdf
- http://axiapublishers.com/images/robux-free-gift-card_GM431946152.pdf
- http://axiapublishers.com/images/coin-master-pro-hack_GM406889139.pdf
- http://axiapublishers.com/images/rblx-city-free-robux_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_004_off000053ad.bin` `899e85890d9029ed4a21e649834b242e9b04cf4b80e6fd98a0c4dbf131276350`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x53AD	25472 bytes
`font_01_sfnt_off00008e86.bin` `e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E86	3500 bytes
`font_02_sfnt_off00009a27.bin` `b60c874b9cecc7364d7321f3e296119ffaa8148ccaa34f8c151d8aaf9f1e64f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A27	18956 bytes

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