Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7e70f0d99b9a42…

MALICIOUS

PDF

48.9 KB Created: 2021-06-09 09:52:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ad0c580ee2ae2104be0ae986048f2c82 SHA-1: cff3e22073dad25beb8ab42e14e1bbbbcd8f1312 SHA-256: dd7e70f0d99b9a42e23ab25ecab933ca665bbbdf15a9cb6dd5d3daf64c7e374b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It contains an embedded URI pointing to a URL that promises free games or hacks, suggesting a lure for downloading further malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/how-to-get-games-for-free-roblox-hack-game-hack
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-free-bux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/best-free-roblox-items_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-hack_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/websites-to-get-free-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-cheat-client_GM479516143.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-giveaway_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-minecraft-realm-codes_GM479516143.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-tiktok-likes_GM835599320.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/500-free-spins-coin-master_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/robux-free-online_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-promo-codes-for-roblox-2021_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-login-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005573.bin
7666190364e3a3ccc54f8404937bedeceeab43ee16f7d9e380a622db98f94461		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5573 31448 bytes
font_01_sfnt_off00009b4e.bin
c674b58405d64eb26774d984729e39d0c9299a45f1b15c52d713868a1bec1fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4E 18876 bytes

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