Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22f92575ccf4232…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 13:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cb10ac6ddf7635caed612805dc4c1305 SHA-1: 1a8b9f8bf4663cf6b4fc80b936153876ebdfb9d0 SHA-256: b22f92575ccf4232532b6fbca49b405fd60f70274388a85a1fa6f4512d5b270e
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button lure, aiming to trick the user into downloading a file. It contains multiple embedded URLs pointing to potentially malicious content, including one for a 'roblox hack'. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/roblox-hack-noclip-download-pc-2021-13-feb-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BB 25996 bytes
SHA-256: df970b6de7af536d41465ca487e9f40897230015bebe366b2c56de2b1c991fd3
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 2984 bytes
SHA-256: 73748bdb4b19b4e71a000b4a35e7ae498f135060a37b6316d258c69e010fa2f3
font_02_sfnt_off00009580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9580 19876 bytes
SHA-256: 75423a129255cbb837e3578b698171841dd2a1a9a409fca46f324a537ed003dd

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