Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cc8f30178d23b8…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 09:10:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8495b17145a71886510602cd09d8e66 SHA-1: a00dbc226cb1bd01ae18f9913af641e2d82cc7dc SHA-256: d2cc8f30178d23b8c7bcc16e370eda1446b1fab36bf379d2c5d2584fe98f626f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains numerous embedded URLs and a fake CAPTCHA lure, indicating an attempt to trick the user into clicking malicious links. The primary URL, http://netcdn.tw/app/479516143/minecraft-wurst-hacked-client-game-hack, suggests a lure for downloading game hacking tools, which are often bundled with malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/479516143/minecraft-wurst-hacked-client-game-hack
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-apk_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-find-out-who-hacked-your-account-on-roblox_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-hacked-version-download_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-create-your-own-hacks-in-roblox_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/spin-coin-master-hack_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/get-me-robux-for-free_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/ways-to-earn-robux_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-roblox-generator_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-spin-free_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-free-pin_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-make-something-free-on-roblox_GM431946152.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdf
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030db.bin
185185cb56aa421b6f5b9e4e9a3c1974219a8687cf2bcadfa3779cbcb93af9ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30DB 21744 bytes
font_01_sfnt_off00006099.bin
e53125b5c7bb1d2ed45fc012e7c103c06ddfc4678a41cf369a31d21e3b84c15b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 18612 bytes

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