Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2d63ab5b7fa2f3…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 14:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a16c7c2d2547a1fd8ae801f3191a1e1 SHA-1: 62218c35c8179d67985fd14beff5922467fbd524 SHA-256: cc2d63ab5b7fa2f3317bc880bb1cd26e364e1c00455f79816c73ac2198471d25
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on `loba.com.vn` and appear to be part of a link farm designed to attract users searching for game cheats and free in-game items. The primary URL `http://netcdn.co/app/431946152/win-free-robux-robux-robux-free-game-hack` suggests a direct download or exploit attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links and a call-to-action phrase indicates a phishing or malware distribution attempt.

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/win-free-robux-robux-robux-free-game-hack
    • https://loba.com.vn/public/upload/files/roblox-games-with-free-boombox_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-without-gift-cards_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/coin-master-facebook-free-spins_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/hack-coin-master-apk-ios_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/best-free-minecraft-servers_GM479516143.pdf
    • https://loba.com.vn/public/upload/files/robloxcom-free-kkk-k-k-k-k-m_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/good-hacks-to-do-with-a-hang-glider-roblox-treelands_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/free-roblox-inspect_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-trackid-sp006_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/download-roblox-generator-for-free_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/como-hackear-coin-master_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/coin-master-35-2-hack_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/roblox-free-objet_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/coin-master-hack-that-actually-works_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/new-free-money-links-coin-master_GM406889139.pdf
    • https://loba.com.vn/public/upload/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/cheats-for-the-plaza-roblox_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/free-robux-gift-card-codes-december-2021_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/kill-all-prison-life-roblox-hack-script_GM431946152.pdf
    • https://loba.com.vn/public/upload/files/robux-free-eazy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e02.bin
ac02f6044e9a6a87b15ad8c51d130eea4bebf1690bf88a91676943caac001084
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E02 22928 bytes
font_01_sfnt_off0000618f.bin
866c875b7ada575fda7e0b2d16b4e3d455f2c28d19dc14b305271f934871ca62
pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 19036 bytes