Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda27f62e3392343…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 20:12:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aabc30822c6e3bd263c889abeeb5ddd0 SHA-1: dc5590c1a81e7571b922d279878c873b230ddac6 SHA-256: cda27f62e33923430c88c96bab6f8a90c6ae1575c2ffc517fbf040b6053311d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a call-to-action phrase, suggesting it is designed to trick users into downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates a potential download or redirection to a second-stage payload. The document body's content, referencing 'free spins' and 'free robux', aligns with common lure tactics for scams and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • 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 http://netcdn.tw/app/406889139/free-spins-coin-master-haktuts-game-hack PDF link annotation
    • http://e-library.stienobel-indonesia.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-tiktok-username-and-password_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/fake-gps-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-pe_GM479516143.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_002_off00003253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3253 23336 bytes
SHA-256: a776dc2a0e60613d51597665fdcf311c21149434fac236c2223b70520ee8eac1
font_01_sfnt_off00006734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 18484 bytes
SHA-256: f7b6576a3f9b0348374d3a5fd8e4bb71623a7ab150aa44cb754c73ac43401ac4

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