Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fd2c9531cc7fc8…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 17:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3103ae2595345b709b914163dcf29f81 SHA-1: 1e5bc1ca22eac252cd19b533cffa77121a6933a5 SHA-256: 93fd2c9531cc7fc8aa1a790fa1e776e9cd90bee74df6e0e835a6d4ff9f5e28af
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for popular game-related scams like free Robux or Coin Master spins. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs and the document body suggest a phishing or scam attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/how-to-get-free-robux-generator-game-hack
    • http://kita-sunshine.de/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://kita-sunshine.de/images/coin-master-free-spin-group_GM406889139.pdf
    • http://kita-sunshine.de/images/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://kita-sunshine.de/images/free-robux-pastebin_GM431946152.pdf
    • http://kita-sunshine.de/images/free-pet-food-for-coin-master_GM406889139.pdf
    • http://kita-sunshine.de/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://kita-sunshine.de/images/100-robux_GM431946152.pdf
    • http://kita-sunshine.de/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://kita-sunshine.de/images/fb-coin-master_GM406889139.pdf
    • http://kita-sunshine.de/images/robux-generators-that-actually-work_GM431946152.pdf
    • http://kita-sunshine.de/images/free-robux-kid-friendly_GM431946152.pdf
    • http://kita-sunshine.de/images/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://kita-sunshine.de/images/completed-coin-master-hack_GM406889139.pdf
    • http://kita-sunshine.de/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://kita-sunshine.de/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://kita-sunshine.de/images/roblox-hack-apk_GM431946152.pdf
    • http://kita-sunshine.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://kita-sunshine.de/images/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://kita-sunshine.de/images/coin-master-daily-free-spins-link-download_GM406889139.pdf
    • http://kita-sunshine.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d32.bin
97024aacadf2e11d77baf52444fe5e74e87af5bc0848b4a0c38daa3a697543d7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D32 25972 bytes
font_01_sfnt_off0000888f.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x888F 2824 bytes
font_02_sfnt_off0000923e.bin
02a745270f20da848e9c9bdefc0721d63769b74524dfc6c51231bae9bb0d5f7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 18512 bytes