Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06a5bb6ddd1dad7…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 14:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8d3c14c49e8cc8172fba8c8acaaab4a4 SHA-1: 4ed58cbdad9a08ee699674634af25646f135a15c SHA-256: b06a5bb6ddd1dad79e11324c41048474cf476cbd7eb2c9c39d2f38bade720edf
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for obtaining free in-game currency or hacks for popular games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content or downloads. The document's structure suggests it is part of a link farm designed to attract users searching for game cheats.

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/free-rbx-roblox-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-hack-peaple-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/download-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-1-000-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-buy-inspecting_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/get-free-robux-by-pay-out-after-offre_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-vine-crown-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-gratis-hack_GM431946152.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_off00002fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBE 22356 bytes
SHA-256: 1a1a467bb4c891378ec5bc41b23a97f0fcd7ba620d2217956f8acddfee7e3f83
font_01_sfnt_off00006179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 18652 bytes
SHA-256: 20469713f9e72ee000befb7d731cb70a477c4b6ab754fedb158651c3c4c9bbef

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