Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc6b4f187021377…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 01:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 135039889b0b3422eede196212da0e59 SHA-1: 594ce72a5d42ae5b482ac6537c5719aa19218707 SHA-256: 2bc6b4f187021377342739d3fde4de10eb77199247d3d46d4bed90660c205c97
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to trick users into interacting with it, likely to initiate a download. The presence of embedded URLs, including one pointing to a potential payload at 'https://netcdn.xyz/app/479516143/free-minecraft-coins-game-hack', strongly suggests a malicious intent to deliver further malware. No scripts were extracted, but the PDF structure and heuristics indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/free-minecraft-coins-game-hack PDF link annotation
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/master-coins-free_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://education.minecraftIn 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_003_off00004bcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCD 25592 bytes
SHA-256: f609d2bcd1e705867ae1f50a6f0eebf26fb509b8017fcf15628efec44f42a4e9
font_01_sfnt_off00008632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 17712 bytes
SHA-256: 6e5d1622b5b5ef07dc8a948271fef3b2c695a9366def40d17ba89f86a1a60020

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