Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c66da0a40fa3de…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 12:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d3f9938aaa963692cc8c3085cc21ecc SHA-1: 6342a423d9175a23566e700afb2e3157e2728e10 SHA-256: 72c66da0a40fa3de114430ee141e95144b35f0a21546489f26b40b6cd403e585
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a redirector URL associated with malicious activity, specifically advertising a "Robux Generator". The presence of a "CLICK HERE TO ACCESS ROBUX GENERATOR" call-to-action, combined with the ML classifier's high confidence score, strongly suggests a phishing or scam attempt designed to trick users into visiting malicious infrastructure. No scripts were extracted, but the embedded link is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/robux-match.com-free-robux-game-hack In PDF document text
    • https://fotoclub3b.it/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://fotoclub3b.it/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://fotoclub3b.it/images/how-to-hack-roblox-games_GM431946152.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_off00002a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A50 22340 bytes
SHA-256: 8022ab5bf06f0934e3ed07fbc91c28edbf517c766865cb0e7c98ee19d0d98791
font_01_sfnt_off00005bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCB 19092 bytes
SHA-256: 13625695963a426473cdec0e2122eae6fd4ea6201280efa968dfc6869c64504c

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