Malicious PDF — malware analysis report

Static analysis result for SHA-256 743bd43254a6b2a3…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 22:13:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14b0ca45d0649d5c75042fdf065a2753 SHA-1: 0809b0fc8c66929710b76283655c120417895f45 SHA-256: 743bd43254a6b2a3a58eb9100c25e5da031a1a37f27517df5f4679cb50edb9aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, identified as a link farm, that promise free in-game currency and cheats for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a phishing or scamming attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful websites.

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/how-to-get-free-robux-legitimately-game-hack
    • http://slim.sisminkada.net/repository/free-admin-commands-in-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/minecraft-account-hacked_GM479516143.pdf
    • http://slim.sisminkada.net/repository/how-to-walk-through-walls-in-roblox-using-cheat-engine_GM431946152.pdf
    • http://slim.sisminkada.net/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://slim.sisminkada.net/repository/roblox-hacking-website_GM431946152.pdf
    • http://slim.sisminkada.net/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdf
    • http://slim.sisminkada.net/repository/how-to-be-a-vip-on-roblox-for-free_GM431946152.pdf
    • http://slim.sisminkada.net/repository/gold-cards-coin-master-hack_GM406889139.pdf
    • http://slim.sisminkada.net/repository/roblox-help-free-robux_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-tiktok-coins_GM835599320.pdf
    • http://slim.sisminkada.net/repository/free-minecraft-coins_GM479516143.pdf
    • http://slim.sisminkada.net/repository/free-robux-codes-not-clickbait_GM431946152.pdf
    • http://slim.sisminkada.net/repository/can-i-play-roblox-for-free_GM431946152.pdf
    • http://slim.sisminkada.net/repository/real-coin-master-hack-2021_GM406889139.pdf
    • http://slim.sisminkada.net/repository/master-coin-free-link_GM406889139.pdf
    • http://slim.sisminkada.net/repository/free-roblox-gift-card-codes-reddit_GM431946152.pdf
    • http://slim.sisminkada.net/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://slim.sisminkada.net/repository/descarga-de-roblox-hackeado-robux_GM431946152.pdf
    • http://slim.sisminkada.net/repository/get-free-robux-com_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-robux-clothes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a1.bin
60318915dc8e313db335d65f319ddc477236fa5d4f67732aa55a5e68891a7adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30A1 22616 bytes
font_01_sfnt_off00006312.bin
5037f9b35bc8880d05d06772128e29ee5e543a99322ddf86bc66367af2efb0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 19620 bytes

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