Malicious PDF — malware analysis report

Static analysis result for SHA-256 6209b0cf22ac0aa4…

MALICIOUS

PDF

33.6 KB Created: 2021-06-25 21:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c44be820ac55ad3003b87723de98bb2a SHA-1: 7957a55475d8b48830c7718ebc802b0e7dd50691 SHA-256: 6209b0cf22ac0aa4d1ac4ffc7b26cbc3f220441deeec44c227fdc24523a372d9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm heuristic indicates it is designed to redirect users to other malicious or scam-related documents. The document body and extracted URLs suggest a lure for "free Robux" and game hacks, which is a common social engineering tactic. 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 0.9980

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/secret-free-robux-game-hack
    • https://traveljogja.net/ckfinder/userfiles/files/hack-robux-free-2021_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/pubg-600-uc-free-redeem-code_GM1330123889.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/pokemon-go-free-bundle_GM1094591345.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/hack-tiktok-fans-free_GM835599320.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-redeem-code-free_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-download-minecraft-hacks_GM479516143.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-fun-hack_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-hack-game_GM406889139.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-hack-roblox-players-acounts_GM431946152.pdf
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e88.bin
19c80a1312ac649a3d28da91fd1b33b63980a84b2db9e72faa6f8cce07303211
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E88 21948 bytes
font_01_sfnt_off00005efb.bin
1edd11a9bac20daa0a0cb68f7e598cc648e10d32ab2a2058ab5a709af5f3322e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 18820 bytes