Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7058d753f8e40b…

MALICIOUS

PDF

36.0 KB Created: 2021-07-08 16:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2eb6be40f9a84490411ad83473b4cbf2 SHA-1: f46382de92d62c925615562067ee07395ed3adbd SHA-256: 5d7058d753f8e40b44528eeebfb7012e6ad749d58152e9d869641b100829519a
102 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its structure and content, which includes a large number of external links designed to appear as SEO-optimized content for popular games. The primary URL, http://netcdn.tw/app/431946152/free-robux-no-verification-or-survey-2021-game-hack, suggests a lure for free in-game currency or cheats, likely leading to a download or further phishing attempt. The presence of a link farm and the ML classifier's high confidence score indicate a deliberate attempt to distribute potentially harmful content.

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/free-robux-no-verification-or-survey-2021-game-hack
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-get-more-spins-on-coin-master_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/no-gravity-roblox-cheat-engine_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-hack-apk-iphone_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-home_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/free-coin-master-cards_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/cheat-for-roblox-anime-fight-simulator_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/cheat-codes-for-pokemon-galaxy-roblox_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/robux-free-co_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/free-spin-link-of-coin-master_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-how-to-make-clothes-for-free_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-pet-food-free_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/hack-de-counter-blox-roblox-offensive_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spins-app-for-iphone_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/minecraft-free-download-laptop_GM479516143.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/xxlolaplaysxd-free-robux-help-without-bot-verify_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/robuxlove-net-free-robux_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-hack-for-life-in-psridise_GM431946152.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-hack-app-download-free_GM406889139.pdf
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-making-hacker-smilator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000324e.bin
45a2243f6dae1ef905411c44e5429c2b4517f5f15abfe792d04fbfe748881543
pdf-font-stream PDF embedded font (sfnt) at offset 0x324E 22780 bytes
font_01_sfnt_off00006550.bin
a441bd845f25f30d9b35deb0a49928c69a030f2d5bccbb8c502819d18c42e29e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 19772 bytes