Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0d4bd5e394de39…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 02:14:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eab0122ccf25e8d47c310a672ba55b2d SHA-1: 6b3d72876e9a0fb942163072e6a4d4d06138cbcc SHA-256: 4c0d4bd5e394de394c4c624c52784edb5ddfa144d5a146f877a44fed626b1263
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document uses urgency and download lures to trick the user into clicking a link that leads to a malicious download. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URLs further supports a malicious intent to deliver a payload. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-roblox-accounts-with-robux-and-obc-2021-game-hack
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://library.futureuniversity.com/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://library.futureuniversity.com/repository/coin-master-gold-cards-free_GM406889139.pdf
    • http://library.futureuniversity.com/repository/is-minecraft-realms-free_GM479516143.pdf
    • http://library.futureuniversity.com/repository/free-robux-only-username_GM431946152.pdf
    • http://library.futureuniversity.com/repository/is-minecraft-vr-free_GM479516143.pdf
    • http://library.futureuniversity.com/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://library.futureuniversity.com/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://library.futureuniversity.com/repository/free-generator_GM431946152.pdf
    • http://library.futureuniversity.com/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdf
    • http://library.futureuniversity.com/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://library.futureuniversity.com/repository/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://library.futureuniversity.com/repository/how-to-make-robux_GM431946152.pdf
    • http://library.futureuniversity.com/repository/robux-hack-2021_GM431946152.pdf
    • http://library.futureuniversity.com/repository/coin-master-golden-cards-hack_GM406889139.pdf
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • http://library.futureuniversity.com/repository/easy-coin-master-hack-without-verification_GM406889139.pdf
    • http://library.futureuniversity.com/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005275.bin
58b5a4bb071b2a95af48cc54f145fe52e312527db987f39e592c0114f1ed34cc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5275 26460 bytes
font_01_sfnt_off00008ed3.bin
dd2dcc7e36612e8c0a7b3560f5da056cc367c7191a1ce30ee58378eda7b62178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED3 19252 bytes

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