Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ecfe53ed5a5291…

MALICIOUS

PDF

38.0 KB Created: 2021-05-23 17:45:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26aba059d0547aeb1bbb151b23ec0a6f SHA-1: 2e9f4840b6fd84fe04171d985bc88197e750f090 SHA-256: c5ecfe53ed5a529185ab5771edafb3b0a271f29623d4f5dccf7044015dacd3f1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple lures for 'free Robux' and 'free spins', directing users to external URLs. The presence of a payment redirection lure and a visual download button suggests a scam or phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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-codes-no-verification-game-hack
    • https://www.devries-group.de/images/free-spins-for-coin-master-hack_GM406889139.pdf
    • https://www.devries-group.de/images/free-coin-master-spin-daily-link_GM406889139.pdf
    • https://www.devries-group.de/images/robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.devries-group.de/images/coin-master-hack-here_GM406889139.pdf
    • https://www.devries-group.de/images/free-roblox-shirt-templates-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030bc.bin
f407b5fe4f97db1504132136d147d0bd7d27c7069d67ab90423c51ef1b5aecac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BC 28196 bytes
font_01_sfnt_off000071c1.bin
1501cc25bcf8c3b3bf9df14f68216c1cc39cc5b0131e4343b63bafa21afb9c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C1 18776 bytes

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