Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c6c7035951400a…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 14:06:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fa728bcb2309a2b9d7f20f43355b0da7 SHA-1: 863a7356e32e184322fa7afc5e79a9c4b0a04164 SHA-256: 67c6c7035951400a2458414bcd8f4c76b1e0ae925d344a4c6764e89b4433bf52
82 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to entice users into clicking a download link. The primary malicious URL identified is https://netcdn.xyz/app/431946152/rbl-gg-free-robux-game-hack, which likely serves as a distribution point for further malware. The document's content and heuristics strongly suggest a social engineering tactic to initiate a download, aligning with common phishing or scam techniques.

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/rbl-gg-free-robux-game-hack
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-robux-giveaway-live_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/cm-daily-spins_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/optifine-mcpe_GM479516143.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-minecraft-hosting-24-7_GM479516143.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/roblox-free-clothes-generator_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/coin-master-tricks_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/robux-offers_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/coin-master-free-gift-links-2021_GM406889139.pdf
    • http://elearning.man3boyolali.sch.id/__statics/gudangsoal/files/my-roblox-account-was-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c7.bin
4198f1996e165746f80591b576d99bf446da5c5d03f9062dff4a46a3f65c83d2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C7 24280 bytes
font_01_sfnt_off0000818e.bin
36d8e5c8df31ce5774558eb4dff236d908794f1052653b7bf9d7a2310610d2b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 18376 bytes

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