Malicious PDF — malware analysis report

Static analysis result for SHA-256 307e7ddb868da428…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 00:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d42d81ce4286c4cf51948b4b2173961 SHA-1: 3b7cf475a4b5afa65c1f1edf9d99f3b367adf1dc SHA-256: 307e7ddb868da428225be81246983d576f065919fd88fb5cf74a3fdcf6b83f4e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be part of a link farm designed to attract traffic. The document body, though partially corrupted, contains references to 'hack for robux' and 'free spins', suggesting a lure for potentially malicious content. The presence of numerous PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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.online/app/431946152/guuuddinfo-online-hack-for-robux-game-hack
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/minecraft-free-download-windows_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-download-pc_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/apps-for-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/daily-free-spins_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000510e.bin
16a0706e8ee5b696a4d0db536bd81b5eb6a260c9c09497fd94bd98503158704a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x510E 25164 bytes
font_01_sfnt_off00008ad6.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD6 5696 bytes
font_02_sfnt_off000097e8.bin
fcaaac9fc82d3497c908a7c0b3732a51c273019a92a8cef987ac7d43ec42d92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E8 18780 bytes

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