Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d80a2e7c47a5b3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 20:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b4a79a6488e08fad54931692b8c857ab SHA-1: 722cc46b6113e561c534eea979a58c28bc8c226e SHA-256: 61d80a2e7c47a5b36d61e31dd1a57156273b003aa851ff28ca56cb4a56af02c8
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URIs, including one pointing to a potential payload download site. The presence of these elements strongly suggests a malicious intent to deliver a secondary stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-easy-and-fast-game-hack
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-game-free_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-coins-and-spins-2021_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/robux-website_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-hack-app_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/robux-hack-no-verification_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-robux-clothes_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-robux-without-verify_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-level-3_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/free-robux-by-watching-ads_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-free-spin-app-apk_GM406889139.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdf
    • http://www.vvsautomaticdoors.com/uploaded_files/userfiles/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049b5.bin
e4fee6e751a3e519fea5039f6997b20da650c19a9e051e3a368f09acf20c5805		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B5 25080 bytes
font_01_sfnt_off00008269.bin
cd82fd057618e61f88de5dcbfbdf8dcaa9884b2739de6fa529a9953be94575dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8269 18700 bytes

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