Malicious PDF — malware analysis report

Static analysis result for SHA-256 735928d8588f4a03…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 14:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5c72ea8d2cea242b0162e481cdada038 SHA-1: 899cca1fe1bbd9cb050cfd2403f292419167fb0c SHA-256: 735928d8588f4a030832673c6d75e3ba54a105395ad56c5235c7124398990730
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to sites offering "hacks" or "generators" for popular games, suggesting a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the presence of embedded URLs and the heuristic firings indicate a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-hack-ios-reddit-game-hack
    • http://libnh.stikesnh.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-password-needed-and-no-offers_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator-codes_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-cards_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/roblox-gang_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-link-spin_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/free-spins-from-coin-master_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/toolbox-for-minecraft-pe_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-android-no-root_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005365.bin
a6c17e161f2e31a83f2072f04eeaff4b71b083385358f7a68a6fe8b727c08125		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5365 26300 bytes
font_01_sfnt_off00008c2f.bin
f6db0d5ce37e689a46ceb71450432421ac9d8148bbd676fee9db03c905ab63a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 17888 bytes

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