Malicious PDF — malware analysis report

Static analysis result for SHA-256 615173282f884c13…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 02:06:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e2c73cb4bd06129a73a89c69945b7182 SHA-1: 9f3ad6f8c83fbef21c81055be686db953135c212 SHA-256: 615173282f884c13dfd151ca12e76f9a748ec1567f43882291b950f2c880ac86
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to websites offering cheats and hacks for popular games and platforms. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed for SEO manipulation or phishing. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links and the nature of the lures point towards 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/835599320/tiktok-free-100-followers-game-hack PDF link annotation
    • http://libnh.stikesnh.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-hack-lua-script_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-5-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/avatar-the-last-air-bender-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/script-hack-prison-life-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-hack-someones-roblox-account-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hacker-names-list-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/rbx-website_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-studio-free-download-windows-10_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-help-free-robux_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_off000033d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D2 22580 bytes
SHA-256: 9e962b8ec0a701b61fece7604a632a814301a258a312e5b8c91c41cb121c5024
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 18488 bytes
SHA-256: d0b7f04ba90a378b85ad19570f364f994bef9ed68ed0692da46fbd28f1b798bf

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