Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d7259dd329a209…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 22:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ce464ef47197e24ef876b8aebef9e4bf SHA-1: a045abbc8d0bd4f25915d7cd22a72a8d5b3f8eb4 SHA-256: 91d7259dd329a209168a60b88af0c28bd00f6a1b04dd853f81cc34cfe44a6b2c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, presented as a "link farm", that are designed to lure users into clicking them by promising free virtual currency or game items. The primary link, http://netcdn.co/app/431946152/free-20-robux-game-hack, suggests a scam or phishing attempt. The presence of a large number of external links and the ML classifier's high confidence score 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/free-20-robux-game-hack
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-bloxburg-free-bs_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/websites-that-give-you-free-robux_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/best-site-for-free-coin-master_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-fb-champion_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-apple_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-food-for-pet_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-robux-net_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/discord-free-robux-server_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-items_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-5-minutes_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-cards_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-attack-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000307d.bin
52ff5d0f51f107609d088dce0a641349068d6c63bab6dcd8e3d4617b1d8811b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 22016 bytes
font_01_sfnt_off00006129.bin
ebc0b6c8cfb23266c08df6236206f62c5cb14a16c1af1f3c09214ef171d71e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 19012 bytes

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