Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ad3d96898d4161…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 21:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1814704cb38f8a4d7854e00f516bfc46 SHA-1: ad3a4fefd4de160198c13325b5ec863d89bd309f SHA-256: 20ad3d96898d41612c707e6b4543e559c36465c6c9eee0e21822450ccff6584b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by an ML classifier and contains a large number of external links, many of which are SEO-optimized to appear as legitimate resources. The document body and extracted URLs suggest a lure for free Robux, likely leading to a phishing or malware download site. The presence of embedded URLs and the overall structure indicate an attempt to trick users into clicking malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/free-robux-generator-club-game-hack
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/cheat-roblox-windows-10-magnet-simulator-2021_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-easter-event-free-robux_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-ferbuary2021_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/how-to-hack-someone-in-roblox-easy_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/pokeon-ultra-brick-bronze-roblox-free-shiny_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-noob-vs-hacker-vs-pro_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/best-free-catalog-items-roblox_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-hacks-multiplayer-game-hacks_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-hack-that-works-jailbreak_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/hack-for-rubux-on-roblox_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/hacks-for-roblox-super-power-training-simulator_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/robux-hack-2021-no-download_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/como-hackear-roblox-para-tener-robux-2021_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-tnt-rush-hack_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdf
    • https://elearning.maudu-rejoso.sch.id/__statics/gudangsoal/files/free-hacks-for-roblox-games_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cd.bin
86e2b917362b4937e887e508d941443d15f54932a07e3c7e60d4a8added65e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 22316 bytes
font_01_sfnt_off00006291.bin
2932b99edea1b6a16982f80fe75c95551cc01adbbb0ec15aed26fc6631a00049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 18896 bytes

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