Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6b54ee84eaedf5…

MALICIOUS

PDF

35.6 KB Created: 2021-06-28 12:28:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 945b53ffe0caedd24fcb08c52ed62019 SHA-1: ea7438b420783163e0e1b06e254727dfdfa63122 SHA-256: fa6b54ee84eaedf5f8a2747472bbc32b7d6b83a92d4556ef87c931e700fe3d0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains numerous embedded URLs and a prominent call-to-action related to 'Free Robux' and game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic or distribute malware. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, likely leading to the download of further malicious content or engagement in scams.

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-robux-no-human-verification-2021-android-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/killaura-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-free-7-day-streak-rewards_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/sex-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-free-yellow-team_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/buy-robux-free-en-espaol_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pastebin-hack-robux-gratis_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/prison-life-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-20-free-spins-link-2021_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_off0000306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306C 22860 bytes
SHA-256: 3fd456b9be583bdf9a609affda50e55f2dc173b373f2943af444189b405d66b1
font_01_sfnt_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 19912 bytes
SHA-256: f3c91d69d300bdbbb0257f72669479450a91f221330e18a0ee40700a2bc7cf23

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