Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d603b3c27f0ad4d…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 23:17:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 509916b88993fcb0867f844c8473c362 SHA-1: 521b50fd3d7245f32d33d1a698b0ec4ca6c8c203 SHA-256: 4d603b3c27f0ad4d3537cdd079f7d58360f8608732321e9ad26309ae9e6ece5c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains multiple embedded URLs, with one prominent URL pointing to a site offering 'Coin Master Tiradas Gratis 2021'. The presence of a 'download button' heuristic and a 'password-protected archive' lure suggests the document is designed to trick users into downloading a payload. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/coin-master-tiradas-gratis-2021-game-hack
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-rewards-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-free-com_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/robuxmatchcom-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-com-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/ww-roblox-come_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/boku-no-roblox-hack_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-roblox-passwords_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-generator-com_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/hack-coin-master-site-rssingcom_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-images-free_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-without-human-verification-real_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/free-executor-roblox_GM431946152.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-hack-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003822.bin
53f8a44e84d5664579388b5a4226ffae7201c76932cbdacd873b3849cc6e92ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3822 22748 bytes
font_01_sfnt_off00006ae4.bin
205f02078e44dc7cbfbb8341c4d4cb1c387440bb67eb4bb631bd87716442abcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE4 18412 bytes

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