Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e4547bf94225c…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 13:22:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b89f641e3e4808bbd122ae7abafec582 SHA-1: 4ba91ed191d5d137692cb90093a073fb49ed0555 SHA-256: c54e4547bf94225c779b239a1339a9d64f59443b6040ceed23df8576c63cfc7f
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, forming a link farm designed to attract users with promises of free in-game items and hacks. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous game-related URLs strongly suggest a malicious intent to redirect users to potentially harmful content or downloads. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-old-roblox-games-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-gift-card-may-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-hack-windows-7_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-minecraft_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
font_00_sfnt_off00002d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D81 22136 bytes
SHA-256: c3af0eaf273187a998dad5e2fbede28b8a930f41a515f88300c2d2f79d7ff078
font_01_sfnt_off00005eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 19084 bytes
SHA-256: ba1f6e75c18ecdb30aeb5a32c22f1cdeddc2a42afb3984cc0500a7b964f668f8

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