Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d41303737c78a5c…

MALICIOUS

PDF

43.8 KB Created: 2021-06-08 17:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 73f8c0625bcf74f84c9ecd19f6772b45 SHA-1: 1406cfc82ac3fe018472e9539be89ddf998228ff SHA-256: 0d41303737c78a5c843e150ba87f711206fe18757b4cc22b3d2a30f92bba48b8
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a link. This link, 'https://netcdn.tw/app/431946152/is-it-possible-ot-use-cheat-engine-on-roblox-game-hack', likely leads to the download of a second-stage payload. The presence of multiple embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/is-it-possible-ot-use-cheat-engine-on-roblox-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn 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
font_00_sfnt_off00004e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E54 24512 bytes
SHA-256: 1d1ff3c584f2b445b2a674af02464ba14b60aa598cd8b751fe3db05bf9e78b90
font_01_sfnt_off0000864d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864D 19028 bytes
SHA-256: 2c148874b919766a5efb696bba588bfe4a9c9d8c2c377d207115d6cf9b8f0740

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