Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a2faac09f8e974…

MALICIOUS

PDF

41.2 KB Created: 2021-04-28 12:47:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d36c9b82eb8e9718c5219dc50e5917d3 SHA-1: 3ba84c6777f714898f886a60f12bfd1d977f09f2 SHA-256: 99a2faac09f8e9743f1b168e6d035210b572c619bd91c151efc15feb28e120c2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as download opportunities for 'Free Robux' and game hacks, with some links explicitly mentioning CAPTCHA verification. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document body content indicate a phishing or scam attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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-jpg-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/robux-hack-no-survey-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-generator-recaptcha.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/does-getting-1-million-robux-for-free-work.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-money-com.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-robux-on-roblox-with-cheat-engine.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-hair-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-frappe-hacks.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dungeon-quest-hack-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-hack-generator-no-app-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-stucid-fly-hack.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_off0000436f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x436F 25620 bytes
SHA-256: e8907cd924e4183b5a9e38326b4a68d671a502db750b59ede0cae4c3dce0c65d
font_01_sfnt_off00007e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E09 18644 bytes
SHA-256: 4bc8b3d07aa4eba28ef721e6e6b1f0e7c4b8c8920cbf4cdececc1f5cac7c6b8a

Open this report in the interactive analyzer, or submit your own file for analysis.