Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d25c6a87086a1e2…

MALICIOUS

PDF

227.4 KB Created: 2021-07-06 16:56:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d2103c3ad77d75471815ebc1f53fb74 SHA-1: 9ab56333c4b73d715d922cba74e0033de9c39ed8 SHA-256: 1d25c6a87086a1e29f55e71a462a5df08d969ed0a6530f62baa58102364e1411
132 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it presents a fake CAPTCHA and a download lure to deceive the user into installing a browser extension or update. It also contains an external URI pointing to a suspicious URL, likely serving as a download source for malicious content. The document body, though heavily obfuscated, contains references to the external URL and appears to be a lure for game-related downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/without-pokemon-go-free-download-game-hack
    • http://pustakafpsi.uin-suska.ac.id/repository/robux-offers_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/worst-client_GM479516143.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-free-headphones-2021_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-may-2021_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-git-free-privert-servers-in-roblox_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/free-minecraft-java-account_GM479516143.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-scam_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/free-minecraft-maps-pe_GM479516143.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/can-you-hack-coin-master_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-phantom-forces-all-guns-free-and-attachments_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/mobihack-roblox-hack_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/hack-coin-master-game-download_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/robux-get-com_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/admin-commands-roblox-free-download_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-village-4_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031f13.bin
8ed48ab00816b89d60c6241d8c0dd340f6552e03f46c013df918512655f061fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F13 25576 bytes
font_01_sfnt_off00035b0d.bin
c132ad81b27846f9c4982a1382f5377f90b2ce22aec7cebc4568f3f2f98571f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35B0D 19664 bytes

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