PDF malware analysis — malicious · cd951b0065d62794

MALICIOUS

PDF

50.6 KB Created: 2021-06-08 19:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 9e3bff7417942b11163b3418623fdaee SHA-1: 213eadea8779838e90e4a63aacb46206027a2945 SHA-256: cd951b0065d627946e2ab385610dd6e288ff6862485fa58146caafa8236502fc

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document displays a fake CAPTCHA or human verification prompt to trick the user into downloading a payload. It contains multiple embedded URLs, including one pointing to a potential download hosted on netcdn.tw, which is likely part of the malicious workflow. The document body and heuristics strongly suggest a social engineering lure for obtaining in-game currency.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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/how-to-get-robux-for-free-really-works-2021-game-hack
- http://perpus.wdh.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/can-you-give-me-free-robux_GM431946152.pdf
- http://perpus.wdh.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/coin-master-hack-ios-no-human-verification_GM406889139.pdf
- http://perpus.wdh.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/free-robux-without-human-verification-real_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/get-free-coins-on-coin-master_GM406889139.pdf
- http://perpus.wdh.ac.id/repository/all-free-items-in-roblox_GM431946152.pdf
- http://perpus.wdh.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
- http://perpus.wdh.ac.id/repository/earn-robux-today_GM431946152.pdf
- http://perpus.wdh.ac.id//repository/link-for-free-spins-on-coin-master_GM406889139.pdf
- http://perpus.wdh.ac.id/repository/tiktok-free-view-iphone-wallpaper_GM835599320.pdf
- http://perpus.wdh.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdf
- http://perpus.wdh.ac.id/repository/get-minecraft-for-free_GM479516143.pdf
- http://perpus.wdh.ac.id//repository/is-windows-10-minecraft-free_GM479516143.pdf
- http://perpus.wdh.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdf
- http://perpus.wdh.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdf
- http://perpus.wdh.ac.id//repository/how-to-hack-roblox-on-mobile_GM431946152.pdf
- http://perpus.wdh.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005491.bin` `3fb59fcfabf771fcf3104aa4bfd0ab587ee05b62425fce409c4f53daa2b43e31`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5491	33596 bytes
`font_01_sfnt_off00009fd5.bin` `8233685eef8f1b999dbd38305277e96298484bf43d6620efe0d9b3f71e631932`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9FD5	19532 bytes

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