Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd36b0d04146be0…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 06:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e4ca94673c00c7f15eb937188b74975 SHA-1: c6063953a746d8f46bab5ba931fb31bb0f66645f SHA-256: 4cd36b0d04146be0e6b07313177bffd6c569a1493d69fa47699fa334bd227dfb
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains embedded URLs and lures related to game hacks, suggesting it's a phishing document designed to trick users into downloading malware. The ML classifier strongly flagged this PDF as malicious. The presence of multiple URLs pointing to potentially malicious content indicates a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/rc8-roblox-hack-download-game-hack PDF link annotation
    • http://easytransferbrazil.com/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-hack-robux-links_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-roam-roblox-survival_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/como-hackear-vehicle-simulator-roblox-para-tener-12000000_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hack-forums-roblox_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/pubg-uc-yollama_GM1330123889.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-reddit_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
stream_004_off000050d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D8 25352 bytes
SHA-256: bb4a97bb08d3e08ca37f6f0c5586caedac5f8a456426d6cb78e5069f1ce2da32
font_01_sfnt_off0000897c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897C 18900 bytes
SHA-256: 7a4f6447bb12b7365ca19580f6e7ae47b200d2118f78cba67335edb7aafb2c0d

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