Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee0a4e4186cfadd…

MALICIOUS

PDF

45.3 KB Created: 2021-05-14 03:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c97ec8d3143297b093ba77bb1a7cdf3 SHA-1: 1a061faf08da00314f72b8fa0cecef2e9731e025 SHA-256: dee0a4e4186cfadda61c04da19cf43be2080eeb12a7874ab073d8a1f971aa7dd
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and an embedded URI pointing to a URL associated with 'free robux'. This suggests a social engineering attack aimed at tricking users into clicking the link, which likely leads to a malicious download or further compromise. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-robux-without-doing-anything-game-hack
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/minecraft-aimbot_GM479516143.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/minecraft-free-version_GM479516143.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/roblox-robux-hack_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/rbx-sites_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/coin-master-hack-that-actually-works_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • https://www.elearning2020.mtsn1kotaserang.sch.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f21.bin
29cfc635e9b80778e25a5495623c5224f36699a24757779324da0f2e7cceef37		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F21 26076 bytes
font_01_sfnt_off00008c0e.bin
e1e4d521198b5ef2bb2d2ba3e061f6fd747e7988b39df69dcb6ecbaf810b6a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 19240 bytes

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