Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a29e19da68e0025…

MALICIOUS

PDF

42.4 KB Created: 2021-05-18 00:08:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 35efc83f5097491fb222b76b033ab2ed SHA-1: 362a65d397aaa341d9240db09086a3a691f2bc65 SHA-256: 1a29e19da68e00256dc9801a97b5b2e1086d1ac2e2c7125ac7bdec1973114559
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. This link, 'https://netcdn.xyz/app/431946152/get-free-robux-no-verification-game-hack', likely leads to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/get-free-robux-no-verification-game-hack
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/blox-rewards_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/minecraft-client_GM479516143.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-roblox-svg_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master-links_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/roblox-free-clothes-codes_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-spin-and-coin-blogspot_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/roblox-admin-hack_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-70-spin-link_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-spin-coin-master-game_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-do-i-get-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_off00004a8b.bin
d862605b5773fbd6e99fef8a7ef0a69446da6375316ac81b187449f33668bb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8B 24412 bytes
font_01_sfnt_off0000825e.bin
9922d9be899d889309b30d551f0ca0ad5440aa2f545e895e218caf9f3be39a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 18600 bytes

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