Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e89a7d172b4580…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 23:45:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45c50cbae415c5e44c9f9b94fbafddda SHA-1: d0c0c9cefa871eeceef6fc2ca78cbee27fe01a1d SHA-256: 40e89a7d172b4580617b76f54f36213e7f6029876a7a057b799e752bd6da5a6d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, pointing to various game-related cheat and free item lures. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests the document is designed to redirect users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or malware distribution attempt.

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/free-spins-from-coin-master-game-hack
    • http://truebibleteaching.com/images/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://truebibleteaching.com/images/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://truebibleteaching.com/images/free-robux-games-that-actually-work_GM431946152.pdf
    • http://truebibleteaching.com/images/coin-master-free-spins-bit-ly_GM406889139.pdf
    • http://truebibleteaching.com/images/heroes-online-roblox_GM431946152.pdf
    • http://truebibleteaching.com/images/coin-master-redeem-code-free_GM406889139.pdf
    • http://truebibleteaching.com/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
    • http://truebibleteaching.com/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://truebibleteaching.com/images/minecraft-free-ios_GM479516143.pdf
    • http://truebibleteaching.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://truebibleteaching.com/images/free-coins-on-coin-master_GM406889139.pdf
    • http://truebibleteaching.com/images/how-to-get-free-roblox-money_GM431946152.pdf
    • http://truebibleteaching.com/images/windows-10-minecraft-hacks_GM479516143.pdf
    • http://truebibleteaching.com/images/coin-master-free-pet-snacks_GM406889139.pdf
    • http://truebibleteaching.com/images/coinmaster-twitter_GM406889139.pdf
    • http://truebibleteaching.com/images/rbxcity-free-robux_GM431946152.pdf
    • http://truebibleteaching.com/images/free-robux-site_GM431946152.pdf
    • http://truebibleteaching.com/images/minecraft-free-download-unblocked_GM479516143.pdf
    • http://truebibleteaching.com/images/level-coin_GM406889139.pdf
    • http://truebibleteaching.com/images/coin-master-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac7.bin
4c98f5944a7df4ace6d10af0b6caa72ecd977b507c7d8712b1ef1f4a80f29aee		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC7 24276 bytes
font_01_sfnt_off00008209.bin
a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 18148 bytes

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