PDF malware analysis — malicious · df22c1b6964927d3

MALICIOUS

PDF

46.6 KB Created: 2021-06-10 17:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 1117e35c1d3454a988a9b58930b5ffc9 SHA-1: dbd61147f6f544a7c6661e56931e249483f2bf65 SHA-256: df22c1b6964927d3b2af0416862b99d56af8ffa2ef3837b97546be648ca20106

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA and a 'Click Here' call-to-action, strongly suggesting a social engineering lure to trick users into clicking a malicious link. The embedded URL, https://netcdn.tw/app/431946152/click-here-to-get-free-robux-game-hack, likely leads to a site designed to deliver malware or facilitate scams. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious intent to redirect the user.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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/click-here-to-get-free-robux-game-hack
- http://korporacjaroma.pl/images/how-to-get-free-followers-on-roblox_GM431946152.pdf
- http://korporacjaroma.pl/images/hacker-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/free-spins-coin-master-links-blogspot_GM406889139.pdf
- http://korporacjaroma.pl/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
- http://korporacjaroma.pl/images/roblox-rape-hack_GM431946152.pdf
- http://korporacjaroma.pl/images/robux-free-gift-card_GM431946152.pdf
- http://korporacjaroma.pl/images/free-spins-coin-master-hack-2021_GM406889139.pdf
- http://korporacjaroma.pl/images/daily-coin-master-free-spin-link_GM406889139.pdf
- http://korporacjaroma.pl/images/how-often-pubg-uc-benefits-paid_GM1330123889.pdf
- http://korporacjaroma.pl/images/free-robux-generator-2021_GM431946152.pdf
- http://korporacjaroma.pl/images/claim-gg-free-robux_GM431946152.pdf
- http://korporacjaroma.pl/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
- http://korporacjaroma.pl/images/free-robux-with-no-verification-2021_GM431946152.pdf
- http://korporacjaroma.pl/images/lazyblox-com-free-robux_GM431946152.pdf
- http://korporacjaroma.pl/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/minecraft-build-hacks_GM479516143.pdf
- http://korporacjaroma.pl/images/blogspot-free-spins-coin-master_GM406889139.pdf
- http://korporacjaroma.pl/images/roblox-adopt-me-hack_GM431946152.pdf
- http://korporacjaroma.pl/images/demogorgon-roblox-free_GM431946152.pdf
- http://korporacjaroma.pl/images/free-spins-coin-master-links-no-human-verification_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_off00004e3c.bin` `e056b3c5b5cc9f166573fa1b7e9f17d4a03413691a4d8c8f509316e698427f7a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E3C	30448 bytes
`font_01_sfnt_off0000935c.bin` `c57ad1690434184de1eb37ea7cd6cb3a9eb03be661a62db910b348a818f4a114`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x935C	18480 bytes

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