Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18c59bdc6153fe8…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 05:07:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a200be887274693fd73ca8d13f206db SHA-1: b70e2287d7e0607d2dea7d6f0a21705ebb7c7536 SHA-256: f18c59bdc6153fe8c587607c0dbde0a77f8ff442decd6d0eef70e9dcf05d6d48
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic. The document body and extracted URLs indicate a lure related to downloading free game content like Minecraft and Roblox. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

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/479516143/how-to-download-minecraft-java-edition-for-free-game-hack
    • http://huananhai.net/images/scaffold-minecraft-hack_GM479516143.pdf
    • http://huananhai.net/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • http://huananhai.net/images/coin-master-freebies-2021_GM406889139.pdf
    • http://huananhai.net/images/bux-gg-robux-free_GM431946152.pdf
    • http://huananhai.net/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://huananhai.net/images/free-spin-coin-master-hacktoman_GM406889139.pdf
    • http://huananhai.net/images/roblox-hackers-list_GM431946152.pdf
    • http://huananhai.net/images/minecraft-pe-free-download-ios_GM479516143.pdf
    • http://huananhai.net/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://huananhai.net/images/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • http://huananhai.net/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://huananhai.net/images/earn-free-robux-for-roblox_GM431946152.pdf
    • http://huananhai.net/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdf
    • http://huananhai.net/images/coin-master-free-spins-link-download_GM406889139.pdf
    • http://huananhai.net/images/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://huananhai.net/images/today-free-spin-coin-master_GM406889139.pdf
    • http://huananhai.net/images/spin-links-for-coin-master_GM406889139.pdf
    • http://huananhai.net/images/best-way-to-get-free-robux_GM431946152.pdf
    • http://huananhai.net/images/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://huananhai.net/images/robux-offer-wall_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f4.bin
65351650f3784432748837c4106d988aaa92203c55db32eb3c6c965e33fd4c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x49F4 24716 bytes
font_01_sfnt_off00008197.bin
372950b09ae56ccdc45362242de33d197b063ee091c9df90a0e91acdbb6b8628
pdf-font-stream PDF embedded font (sfnt) at offset 0x8197 18572 bytes