Malicious PDF — malware analysis report

Static analysis result for SHA-256 78258fdf325a769d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 12:43:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f4be71ad566f543f600a1fffc6ceb057 SHA-1: 679b89cca38802467fb2989bda0b320ae4e32dca SHA-256: 78258fdf325a769dcc98913ed92b68abc43985522f4b009c12d36641853e70f0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to pages offering game hacks and cheats. The primary URL, https://netcdn.xyz/app/406889139/coin-master-3.5-2-hack-game-hack, is directly associated with a 'Coin Master hack'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-3.5-2-hack-game-hack
    • http://kids-academy.pl/images/free-robux-no-verification-required_GM431946152.pdf
    • http://kids-academy.pl/images/roblox-font-free_GM431946152.pdf
    • http://kids-academy.pl/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://kids-academy.pl/images/daily-coin-master-link_GM406889139.pdf
    • http://kids-academy.pl/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • http://kids-academy.pl/images/www-roblox-com-free-robux_GM431946152.pdf
    • http://kids-academy.pl/images/instagram-coin-master-free-spins_GM406889139.pdf
    • http://kids-academy.pl/images/get-free-robux-no-human-verification_GM431946152.pdf
    • http://kids-academy.pl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://kids-academy.pl/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • http://kids-academy.pl/images/free-robux-generator-for-kids_GM431946152.pdf
    • http://kids-academy.pl/images/complete-offers-for-robux_GM431946152.pdf
    • http://kids-academy.pl/images/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://kids-academy.pl/images/cheats-coin-master-free-spins-and-news_GM406889139.pdf
    • http://kids-academy.pl/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://kids-academy.pl/images/free-coin-master-gifts_GM406889139.pdf
    • http://kids-academy.pl/images/get-robux-com_GM431946152.pdf
    • http://kids-academy.pl/images/hack-para-coin-master-sin-verification_GM406889139.pdf
    • http://kids-academy.pl/images/free-robux-generator-2021_GM431946152.pdf
    • http://kids-academy.pl/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497c.bin
555338c264a6681c6d06b035a11eed3671ebcec3e18b5bd36bfaa9423a6202fc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 24184 bytes
font_01_sfnt_off000080be.bin
2ce71f06b10a700cf3f084aa68b33ab002ddef2a56e6912d95d46e88b5551211
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 18216 bytes