Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe37342f3b0cf27d…

MALICIOUS

PDF

32.4 KB Created: 2021-06-26 01:27:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 64e5ab9884ff50a5c8bc8c9304c0717c SHA-1: 7ce923450d4337a0a8522e4a55cf2390b694b8da SHA-256: fe37342f3b0cf27d56fcb4eccefcc14907303c37cea7e23f084b03a87a931fbb
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are related to game cheats and hacks, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports this. The document body explicitly mentions 'Roblox Mobile Robux Hack' and provides a URL for a 'Robux Generator', indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-mobile-robux-hack-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-tiktok-hands-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/tiktok-free-2021-views_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/5-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-admin-commands-on-roblox-jailbreak-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/comment-avoir-le-free-skin-de-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-gift-box_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-robux-hack-mod_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_off00002959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2959 21968 bytes
SHA-256: cbd88db2ded8de908fe14b5c69b6ca22cdb0201b83e54fff7db79fa565516991
font_01_sfnt_off000059e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 19112 bytes
SHA-256: a519ed7c8e1046a37ad693cb46db0e64e416d6dc38b01e5e6d908be4d0518816

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