Malicious PDF — malware analysis report

Static analysis result for SHA-256 9342aa73729a12fa…

MALICIOUS

PDF

36.1 KB Created: 2021-05-22 20:46:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a44f46e6560baf3f52b47268e61de59c SHA-1: 085ab9cebaf2ade9a914fcd1095a9d8ca9210976 SHA-256: 9342aa73729a12fade4fe08a477ca39102da7c292272e2e50901f27e45a328df
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA and contains a prominent "CLICK HERE TO ACCESS ROBLOX GENERATOR" call to action, strongly suggesting a social engineering lure. The embedded URL https://netcdn.xyz/app/431946152/robux-com-free-robux-game-hack likely hosts a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/robux-com-free-robux-game-hack PDF link annotation
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://rblx.landIn 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_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 24788 bytes
SHA-256: dcb3fc3a23f4ae8aadb34674871f34cb28e2e03066e1cb02e9e44441cb01c62a
font_01_sfnt_off00006bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC5 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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