Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b71b12814043c1…

MALICIOUS

PDF

54.7 KB Created: 2021-05-13 11:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2b1a101be70ed6d16ad244ffb3753188 SHA-1: 1e51b11c764d17facc7c8cd587c8773064b01a52 SHA-256: 56b71b12814043c14337ae6fba9a7d698c13df7ab31aaa20feb52052622bf694
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of a fake CAPTCHA lure, aiming to deceive users into performing an action that likely leads to downloading malicious content. The presence of external URIs and embedded URLs, such as https://netcdn.xyz/app/431946152/heroes-online-roblox-game-hack, suggests the document is designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to exploit user interaction for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9400

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.xyz/app/431946152/heroes-online-roblox-game-hack
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/minecraft-aimbot_GM479516143.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/minecraft-images-free_GM479516143.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/roblox-survey-for-robux_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/minecraft-free-no-virus_GM479516143.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-game_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/roblox-script-hacks_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/coin-master-date-and-time-hack_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/free-coins--spins-coin-master_GM406889139.pdf
    • https://elearning.man5kediri.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d4a.bin
ea504cc7a094d56169278379327e09b7dc9734b3d7df2a78246fea3f9c3c85a7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4A 32608 bytes
font_01_sfnt_off000098f8.bin
ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F8 8704 bytes
font_02_sfnt_off0000b563.bin
d2079bf99977f163cee1c7bcc2927f6b86f82a10be6ceb2207c7e7d42ad6dc1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB563 17904 bytes

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