Malicious PDF — malware analysis report

Static analysis result for SHA-256 0958291dcaaceca8…

MALICIOUS

PDF

48.4 KB Created: 2021-05-12 14:30:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0ef6cd90e4487f046d4220e85e8ae79a SHA-1: 4fa0d83ca71fd36c8d341802bfd9ff648e814038 SHA-256: 0958291dcaaceca822fe92e54c214a67bdf3fcba40039d6a6606066a9207a13b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to IP addresses, which is indicative of a link farm designed to host malicious or misleading content. The document body and extracted URLs suggest a lure for free in-game items or server hosting, a common social engineering tactic. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/how-to-make-your-own-minecraft-server-for-free-game-hack
    • http://36.94.36.7/elib//repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://36.94.36.7/elib/repository/free-ways-to-get-robux_GM431946152.pdf
    • http://36.94.36.7/elib//repository/robux-hack-free-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/hack-xp-net-generators-coin-master_GM406889139.pdf
    • http://36.94.36.7/elib/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://36.94.36.7/elib//repository/can-you-actually-get-free-robux_GM431946152.pdf
    • http://36.94.36.7/elib//repository/unlimited-free-spins-coin-master_GM406889139.pdf
    • http://36.94.36.7/elib//repository/coin-master-free-spins-hack_GM406889139.pdf
    • http://36.94.36.7/elib//repository/how-to-get-free-robux-codes_GM431946152.pdf
    • http://36.94.36.7/elib//repository/100-free-spins-coin-master_GM406889139.pdf
    • http://36.94.36.7/elib//repository/www-free-robux-com_GM431946152.pdf
    • http://36.94.36.7/elib//repository/hack-coin-master-spin-apk_GM406889139.pdf
    • http://36.94.36.7/elib/repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://36.94.36.7/elib/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-hacker-us_GM431946152.pdf
    • http://36.94.36.7/elib/repository/free-robux-gen_GM431946152.pdf
    • http://36.94.36.7/elib/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://36.94.36.7/elib//repository/how-do-i-get-robux_GM431946152.pdf
    • http://36.94.36.7/elib//repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://36.94.36.7/elib//repository/minecraft-logo-maker-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ea.bin
2a1a6348999d2b4727f007cbb88e72e51033aac6ddd6ede6566dcf73459d8110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47EA 36284 bytes
font_01_sfnt_off000090b2.bin
8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 2856 bytes
font_02_sfnt_off00009a88.bin
43abef8b834297908dc205ac191a436a457546b124377fb637ef7db2584f74fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A88 18460 bytes

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