Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f51ced8bd84b7e…

MALICIOUS

PDF

28.7 KB Created: 2021-06-22 21:46:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e7afc712ea81ca56f5e9c7833dde822e SHA-1: 2b20b0135ed4f521688edd8620100fc9fee4f618 SHA-256: 77f51ced8bd84b7e194905bc8c86e03f779078e5884b675c636ad58298791296
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on a domain associated with SEO link farming. The document body and extracted URLs suggest a lure for game hacks and generators, likely leading to potentially unwanted applications or scams. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains a large number of external links, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.co/app/406889139/coin-master-offline-hack-game-hack
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-roblox-generator_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-boys-pajamas-free-shipping_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-do-you-earn-robux-on-roblox_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-com-hack_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-india_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-ulimtamate-gamer_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-hack-app-link_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/ways-to-get-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003321.bin
88da584962f1c1ee9313896426e7c6fb6f8314483646e95606c93edc53ebe895		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3321 23112 bytes

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