Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62b3bf7cdba8a60…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 19:48:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f5ff8d2caa51fa951dcc922afc309327 SHA-1: ac3a3b1fb49944863532575194b09d6a9d4867f8 SHA-256: d62b3bf7cdba8a60c4d2a73c6457c467cd990c1d4936fb199f96b405154774d9
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. The primary link, http://netcdn.tw/app/431946152/how-you-get-free-robux-game-hack, is likely intended to lead to a malicious download or further compromise. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-you-get-free-robux-game-hack
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/to-get-free-robux_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/hacks-arsenal-roblox-tampermonkey_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-robux-clibait_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-roblox-zephplayz_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/game-give-free-robux_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/how-to-minecraft-for-free_GM479516143.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/coin-master-online-hack_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-robux-hacl_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-robux-images_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-spin_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • http://smagripadps.sch.id/new/public/ckfinder/userfiles/files/minecraft-kill-aura_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000327c.bin
c299fe63fd8239b2ca7f2e7e409cc0c84263623d4dd222ab21cbe25672b654fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x327C 22744 bytes
font_01_sfnt_off00006517.bin
347a02abbc70d9a51f290361347438ae6cbd927e0a0fbf4b37ccbc96466cb725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6517 19144 bytes

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