Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cec1b40dbe5f09…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 15:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d52fd0becb045d8ef056c1e389512ff8 SHA-1: 3cafb202f0ed73e5d91741a37e626df7fee6dc45 SHA-256: 27cec1b40dbe5f097703556e8df82e33b77e77e9c84114bea600d8d942c79523
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to websites offering game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs suggests a link farm designed to redirect users to potentially harmful sites. No scripts were extracted, but the overall structure and content point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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-heaven-daily-free-spins-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-items-with-roblox-card-walmart_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-no-hack-april-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/master-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C1 23100 bytes
SHA-256: 3cf516d58dddd2d37b0b28d455e0e5b47505f1bd05d92cb70d14b4d601e69b25

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