Malicious PDF — malware analysis report

Static analysis result for SHA-256 53475b6a37d6b01b…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 10:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 26b96739eaa02464ed924585e85f0b8c SHA-1: 5a4f913087595588c9c0aab7c90db0f8a9144d5e SHA-256: 53475b6a37d6b01b96c5e3b4cd89aaf4309f789658fcea42ea8a7d0618833e21
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 "game hacks" or "generators" to entice users. The primary external URI points to a suspicious URL hosted on netcdn.online, likely serving as a lure for a malicious download. The presence of a large number of external links, coupled with the ML classifier's high confidence score, indicates a malicious intent to direct users to potentially harmful content.

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-free-spins-and-chips-game-hack
    • http://library.thamrin.ac.id/repository/play-coin-master_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/hack-the-game-coin-master_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/coin-master-free-soins_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/pubg-uc-generator_GM1330123889.pdf
    • http://library.thamrin.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/free-robux-not-a-scam_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • http://library.thamrin.ac.id/repository/hacked-roblox-game_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/coin-master-free-account_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/free-robux-no-download_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/best-hack-for-coin-master-2021_GM406889139.pdf
    • http://library.thamrin.ac.id/repository/free-robux-sites-that-work_GM431946152.pdf
    • http://library.thamrin.ac.id/repository/robux-hack-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000559f.bin
8cc9c8bc0d0a0ea1dcd6627da13cdefc435420e2ba4acc7a4e04a0b22c3b8e2b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x559F 24356 bytes
font_01_sfnt_off00008d92.bin
40df3a528aafa73505b8835a2bb808a281604419b6ece47625fe10d66aca2743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D92 18224 bytes

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