Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf93ba0354fac0dd…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 16:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88cf643f36566d1ce787bd1974f817e0 SHA-1: a310c7ae5b39b9cac16de4c25623a3fcc28ad9e7 SHA-256: bf93ba0354fac0dd81edb29249e21a78c23f4ad334dc1e23fe056d10d5df58d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are structured as SEO-friendly slugs pointing to game-related hacks and cheats. One prominent URL, https://netcdn.xyz/app/406889139/cmaster-club-coin-master-hack-game-hack, is directly embedded. The heuristic firings, particularly PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly indicate a malicious intent to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

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/cmaster-club-coin-master-hack-game-hack
    • http://ilifemarket.ru/images/free-arsenal-hacks_GM431946152.pdf
    • http://ilifemarket.ru/images/free-coin-master-spin-daily-link_GM406889139.pdf
    • http://ilifemarket.ru/images/free-minecraft-severs_GM479516143.pdf
    • http://ilifemarket.ru/images/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://ilifemarket.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://ilifemarket.ru/images/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://ilifemarket.ru/images/coin-master-free-spins-link-ios_GM406889139.pdf
    • http://ilifemarket.ru/images/robux-hack-free-robux_GM431946152.pdf
    • http://ilifemarket.ru/images/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://ilifemarket.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://ilifemarket.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://ilifemarket.ru/images/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://ilifemarket.ru/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://ilifemarket.ru/images/coin-master-free-gift-link-2021_GM406889139.pdf
    • http://ilifemarket.ru/images/coin-master-hack-version-ios_GM406889139.pdf
    • http://ilifemarket.ru/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://ilifemarket.ru/images/easy-coin-master-hack_GM406889139.pdf
    • http://ilifemarket.ru/images/how-to-get-roebucks-on-roblox_GM431946152.pdf
    • http://ilifemarket.ru/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://ilifemarket.ru/images/coin-master-vip-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004923.bin
184c1ff487a5b5c9ac5fe2029b982d7393f180e2a025389135d9311f3d1fe9dd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4923 25512 bytes
font_01_sfnt_off00008191.bin
770ec93328e1c8b307bcbfea9c0f1da9416090f0471e9d56bc95ec3568114428
pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 18348 bytes