Malicious PDF — malware analysis report

Static analysis result for SHA-256 741ade65c2c45df9…

MALICIOUS

PDF

43.7 KB Created: 2021-06-07 13:50:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9bf32d2a1ff093b379a10cf41bd9b406 SHA-1: 6b0aaa9115d71f1a7a42eea8c3c5a5baa772906d SHA-256: 741ade65c2c45df9862f2deecc2ae74e082d22cb3a3c46695a91c9bf47214b4b
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into downloading a payload from the embedded URL. The ML classifier also flagged this PDF as malicious. The primary URL points to a file named 'cheat.otg-roblox-game-hack', suggesting a lure related to game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/cheat.otg-roblox-game-hack PDF link annotation
    • http://cornerwebstudio.com/images/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-games-free-online-for-kids_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E57 24520 bytes
SHA-256: 040d7759b75a9c0e7d2147e41fd26eccbff41127e0bc8d54f37711b1cb203b36
font_01_sfnt_off000086c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C5 18636 bytes
SHA-256: 802822ce71de3ac242045bb19f35a96f5bb6918cba8360548472f9026dd436d5

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