Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d13d7d9ac3cbfad…

MALICIOUS

PDF

36.7 KB Created: 2021-07-03 21:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2bb55067ae5915853c7abf8cf4fffed1 SHA-1: eaf9e796e06ebe2cfd7f6ca9d7fc0f2eff9ff1e5 SHA-256: 6d13d7d9ac3cbfadde7b0f52c593ba1c35374fe6f0e95f528325c0003b55cd0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are presented as 'SEO link farm' content related to game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests the document is designed to redirect users to potentially harmful sites. No scripts were extracted, but the overall structure and content point to a phishing or malware distribution attempt.

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.tw/app/431946152/roblox-sword-fighting-tournament-points-hack-2021-game-hack PDF link annotation
    • http://perpustakaan.uf.ac.id/opac/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/free-kick-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/dragon-ball-z-final-stand-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-change-your-roblox-username-for-free_GM431946152.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_off00003376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3376 23048 bytes
SHA-256: c40440ad2bcaf44f1d40b908a04e91c4992424c90d7579a1ab461a151b849e5e
font_01_sfnt_off0000672c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 20316 bytes
SHA-256: ce1c487fdc20a7bee0d3f2934e28917bff967fd60d982b10e15403ba409da368

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