Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e8911194c2bea22…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 13:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fa14de86afeec09556af386292d7d176 SHA-1: 6328780258d69e2a74828627584cdb8ea581a9fc SHA-256: 3e8911194c2bea228c962ac7a628330f87cd81032d8ec68ba8786745f5fa1295
102 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with many URLs pointing to SEO-optimized documents related to game hacking and free in-game currency. The primary URL, http://netcdn.co/app/431946152/how-to-make-a-roblox-hack-gui-visual-studio-game-hack, suggests a lure for users seeking cheats or exploits. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes, such as distributing malware or phishing for credentials.

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/how-to-make-a-roblox-hack-gui-visual-studio-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/faztokens-hack-the-pizzaria-roleplay-remastered-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-for-free-no-human-verification-ipad_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-cheat-codes-for-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-survey-no-download-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/blockland-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-installer_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-your-own-clothes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-in-roblox-prison-life-v20_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-dungeon-quest-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-tix-robux-hack-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-para-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BB 22372 bytes
SHA-256: 6b961ea969085c4cc4e91862b15fbe7e699982e7ce24ddac5c843ef96a36ac99
font_01_sfnt_off000062c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C1 19688 bytes
SHA-256: fb44e15c865e9c30c22db8b07af8fd2037ff8caefafb47abaab60e3ac459cedd

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