Malicious PDF — malware analysis report

Static analysis result for SHA-256 45218df23f930842…

MALICIOUS

PDF

33.7 KB Created: 2021-06-25 21:20:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6e8a72e26d25bcb6c4d6b272611abf8 SHA-1: 70393463f8e976e68a9a47ee570df7b718a48d46 SHA-256: 45218df23f9308422cc76b50cda123d176ccc361cb6d22590b5e0c4474df66f1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a document body that promotes free game cheats and virtual currency, indicative of a lure for malicious downloads or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high, suggesting a strong likelihood of malicious intent. The primary IOC is the URL http://netcdn.co/app/431946152/is-there-a-free-way-to-get-robux-game-hack, which is likely the initial download or landing page.

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/is-there-a-free-way-to-get-robux-game-hack
    • http://www.nguyentraiedu.vn/cms/public/upload/files/lyce-de-roblox-2-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-game-online-free-download_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-hacks-for-booga-booga_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/claim-free-robux-button_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/beach-house-roleplay-roblox-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/cheat-engine-codes-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/dungeon-quest-cheat-engine-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-sell-a-free-model-on-roblox-studio_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/a-free-rix-code-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-roblox-phantom-forces-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-hack-app-2021_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/promo-codes-for-free-robux_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-ro-gwet-free-robux-on-tablet-2021_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/robux-cheat-app_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/secret-free-robux-generator-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e87.bin
17438e57b88e29edfefa53c5ddcb6d72641469280ef72c64375ebd3f23fca029
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E87 21428 bytes
font_01_sfnt_off00005d81.bin
e918f60ce7c7850b03c14a1819e51c87dfc0bc6c6a5cc96dc4a70376a75ad2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 19364 bytes