Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c17987412df3587…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 02:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 497fe32d63f3a6634e46fb3492971e00 SHA-1: a11fdff0f274730ed4e3c892854fadebc6527121 SHA-256: 5c17987412df3587d6de59d55ca0272398b705499f46e27fa19c1c1dca9ab49d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a document body that promotes free Robux and game hacks, indicating a lure for users to visit potentially malicious websites. The heuristic findings confirm the presence of a large number of external links and a ML classifier flagging the PDF as malicious. The primary attack vector appears to be directing users to external sites via malicious links, likely for credential harvesting or further malware distribution.

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.tw/app/431946152/how-to-get-free-robux-no-human-verification-game-hack
    • http://mtsn2ende.com/__statics/gudangsoal/files/roblox-ragdoll-system-test-hack_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/roblox-images_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/robux-free-c_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-hack-online-generator_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/hack-coin-master-ios-download_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/roblox-free-rainbow-wings_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-spin-coin-master-app-download_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-spin-coin-master-hacktoman_GM406889139.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/roblox-phantom-forces-aimbot-free-download_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/free-vpn-for-minecraft_GM479516143.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/minecraft-free-play-now_GM479516143.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdf
    • http://mtsn2ende.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd3.bin
7c0234457519eb86c8c629e83174958dd8c3578d51342e9d68a57567358bfa8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD3 21372 bytes
font_01_sfnt_off00005e9c.bin
1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 19496 bytes

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