Malicious PDF — malware analysis report

Static analysis result for SHA-256 4522772dbbf0669b…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 12:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f1aa8ca3ef781ff48ac2f117e32fbddf SHA-1: ab251a2a703158c208f814f6433cc86309003d85 SHA-256: 4522772dbbf0669b18a5775a82c60dafb6dc39a3251d9a34c7cc93584806d7e1
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting a "free Robux" generator. The ML classifier also flagged this PDF as malicious. The presence of a visual download button and the lure of free in-game currency suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robuxmatch.com-free-robux-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spin-link-coin-master-today_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_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 24584 bytes
SHA-256: 5ce9a22c33a4db88e0024b4c0aa09cb9e63d546f8305e06ca54a07aaf734988a
font_01_sfnt_off00006979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 18840 bytes
SHA-256: 5c4f625c96edef5f8da70d27324c4adb1887d0c0038b5237fb9b16f25e0c59c0

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