Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e206828fe256eca…

MALICIOUS

PDF

50.2 KB Created: 2021-05-12 07:37:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73bcaab64bc532023edb9db2494ee9c7 SHA-1: 6b1a2593de5b267d5942f59f6f7faa86f3cc17d3 SHA-256: 0e206828fe256eca28f5c0ae7ac67539156a7d9aef48cbade525c0b62ac80566
102 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document and subsequently downloading malicious files. Multiple external URIs and embedded links point to various exploit-related PDFs, suggesting a downloader or dropper functionality. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-svg-free-game-hack
    • http://36.94.36.7/elib/repository/best-coin-master-hack_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-app-real_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://36.94.36.7/elib//repository/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/coin-master-spins_GM406889139.pdf
    • http://36.94.36.7/elib/repository/free-spins-for-coin-master-that-work_GM406889139.pdf
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://36.94.36.7/elib//repository/hack-coin-master-apk-2021_GM406889139.pdf
    • http://36.94.36.7/elib/repository/free-minecraft-bedrock_GM479516143.pdf
    • http://36.94.36.7/elib/repository/hack-coin-master-using-pc_GM406889139.pdf
    • http://36.94.36.7/elib//repository/coin-master-hack-facebook_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-real-working_GM431946152.pdf
    • http://36.94.36.7/elib//repository/coin-master-jackpot-madness-hack_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://36.94.36.7/elib//repository/free-minecraft-skins-girl_GM479516143.pdf
    • http://36.94.36.7/elib//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://36.94.36.7/elib//repository/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://36.94.36.7/elib//repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac8.bin
744fe5620c4c017c86e747522256bc1c1c38beeb6244455fdc4f48ffe58560c0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC8 40312 bytes
font_01_sfnt_off0000a21c.bin
82620550cff65874d98c2836b8a60b7f72357efbb651992cfb4f65634f65914f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA21C 18348 bytes

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