Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e0a8951864e7e8…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 18:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f70f469a9b4093a9ca7478e3ccca65f7 SHA-1: 11a28136ffc654f9a699aa5eedd0cf80ceafa504 SHA-256: b4e0a8951864e7e8ae9141db167deb4210542d71535467f60054391d01451f2d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL, 'https://netcdn.xyz/app/431946152/get-me-robux-for-free-game-hack', likely leads to a payload download. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/get-me-robux-for-free-game-hack PDF link annotation
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/my-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-microsoft_GM431946152.pdfIn 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
font_00_sfnt_off00004a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A57 25760 bytes
SHA-256: 340632ac5c35a7b0ca388613ee98bbdde17f4f227974c45ac7afdcf5f53bbfcd
font_01_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 5756 bytes
SHA-256: 400ee760d8ba2af4a989a89998a708334648619bc88f048e6e7319998473a993
font_02_sfnt_off00009205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9205 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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