Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e25936e9209c14…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 04:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: db07d144e89329be17ad5c0f8033ded9 SHA-1: 816eb38dcf1d4007970901cd02d2fe76d8f36c36 SHA-256: c9e25936e9209c143fa9323abf25852a89992b7a1f8b89ee64adc42d5d7d1d34
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it's a lure for users to install a browser extension or download a file, likely malicious. The document body and embedded URLs promote topics like 'free robux' and 'game hacks', directing users to external sites. The presence of an external URI pointing to 'netcdn.co' suggests a download attempt, which is a common social-engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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-vote-kick-on-free-draw-roblox-game-hack
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-free-pets_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-coin-master-credit_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-2021-accounts-roblox_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-2021-july_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-account-taker_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-rbxbost_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack_GM406889139.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdf
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-gifts-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003130.bin
6f76b2df9eb11f469a3f83e9442d50c3a9a06dc6bcac09abc913efcd6250972d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22592 bytes
font_01_sfnt_off0000636e.bin
5df9a3439b2761b3e13961c079f60cbcd413fbdce9cd75414e75d5c52ce32527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 19512 bytes

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