Malicious PDF — malware analysis report

Static analysis result for SHA-256 412d3feebfd7a562…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 19:26:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8715ae20fc2e46ebf8e9513dc693cecf SHA-1: 7bdf568d3ebc4041248af7b6bcd9955e8cd9bbb3 SHA-256: 412d3feebfd7a5629437a3803b545def69635c2b3994188afd8d4437f073d370
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering 'free robux' or 'free spins' for games. The document's content and structure strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites or downloading malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-zone-free-robux-generator-game-hack
    • http://bressanassessoria.com.br/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://bressanassessoria.com.br/images/free-spins-on-coin-master-app_GM406889139.pdf
    • http://bressanassessoria.com.br/images/minecraft-marketplace-free_GM479516143.pdf
    • http://bressanassessoria.com.br/images/how-to-get-robux-free-no-download-quick-2021_GM431946152.pdf
    • http://bressanassessoria.com.br/images/coin-master-apk-mod-free-download_GM406889139.pdf
    • http://bressanassessoria.com.br/images/pourquoi-quand-jessaie-de-hacker-des-robux-a-marche-jamais_GM431946152.pdf
    • http://bressanassessoria.com.br/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://bressanassessoria.com.br/images/how-you-get-free-robux_GM431946152.pdf
    • http://bressanassessoria.com.br/images/minecraft-mac-free_GM479516143.pdf
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://bressanassessoria.com.br/images/how-to-get-free-stuff-roblox-2021_GM431946152.pdf
    • http://bressanassessoria.com.br/images/roblox-hack-scripts-jailbreak_GM431946152.pdf
    • http://bressanassessoria.com.br/images/roblox-dashing-simulator-cheat_GM431946152.pdf
    • http://bressanassessoria.com.br/images/coin-master-hack-xyz-download_GM406889139.pdf
    • http://bressanassessoria.com.br/images/roblox-free-audios_GM431946152.pdf
    • http://bressanassessoria.com.br/images/free-coin-master-spins-no-human-verification_GM406889139.pdf
    • http://bressanassessoria.com.br/images/how-to-install-hacking-programs-on-roblox_GM431946152.pdf
    • http://bressanassessoria.com.br/images/roblox-hack-2021-free_GM431946152.pdf
    • http://bressanassessoria.com.br/images/minecraft-115-2-hacks_GM479516143.pdf
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-on-roblox-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003130.bin
5cdb2b58593900c81a1328af433ed1d530ceeddbb8ee2633f9f8fc8002808044
pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22784 bytes
font_01_sfnt_off00006426.bin
af35ca273278bbbac6092dc927a90cebee6a56c2413ff420a4fcdee40f68de8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 18988 bytes