Malicious PDF — malware analysis report

Static analysis result for SHA-256 571b75b67df80952…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 00:25:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d30c1947c0760d33b65e957841ca296 SHA-1: b798f01e24f36413b3e4756018f65a3aba69fb6a SHA-256: 571b75b67df80952c08a270f0d7b9ecda2e0e8b12cd5e09b11a6befc4278e66b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a direct URL, all pointing to websites offering game-related cheats and hacks, such as 'Roblox Free Radio Games'. The presence of a 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links designed to attract traffic, likely for malicious purposes. 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-free-radio-games-game-hack
    • https://www.knjigebuducnosti.com/files/claim-free-robux-button_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/roblox-test-for-free-robux_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/rblx-gg-free-robux_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/how-to-hack-roblox-accounts-without-cheat-engine_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/how-to-get-tiktok-famous-free_GM835599320.pdf
    • https://www.knjigebuducnosti.com/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • https://www.knjigebuducnosti.com/files/how-to-hack-unblock-roblox_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/free-robux-app_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/how-to-get-back-my-hacked-roblox-account_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/free-items-script-assassin-roblox_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/coin-master-hack-generator-tool_GM406889139.pdf
    • https://www.knjigebuducnosti.com/files/break-free-song-id-roblox_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/free-roblox-promo-codes-october-2021_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://www.knjigebuducnosti.com/files/robux-today_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/coin-master-free-coins_GM406889139.pdf
    • https://www.knjigebuducnosti.com/files/how-to-get-robux-for-free-hacking_GM431946152.pdf
    • https://www.knjigebuducnosti.com/files/roblox-black-panther-shirt-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003251.bin
ff15da1911d79ddfa0c37b9e4cf40b5095ef140e966605a2f1122873b02251c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x3251 22748 bytes
font_01_sfnt_off000063ec.bin
336eefbf72fbe01a6c261119e0a3ce2bcabd6e57cbd2778ff897ae4011e9df00
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 19204 bytes