Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbbd4e5a493bd51…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 13:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cb1ce6362301ec3e9cabd4fbbfcc3d31 SHA-1: c41d2ed46b4057cc07c7dd254f97afc864a01d4e SHA-256: fdbbd4e5a493bd5193bdddf7c33f63551045bc4f74d9066e2bf9292bbc29ef8d
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious SEO link farm, designed to lure users with promises of game hacks and exploits for Roblox. The document contains numerous embedded URLs pointing to other PDFs, many of which are SEO-optimized with game-related keywords. The primary URL, http://netcdn.co/app/431946152/roblox-hide-and-seek-game-for-free-game-hack, likely serves as a gateway to a secondary payload or further malicious content.

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/roblox-hide-and-seek-game-for-free-game-hack PDF link annotation
    • http://library.stipjakarta.ac.id/etd/repository/grandz-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-noclip-in-roblox-mac-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-headphones-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/cach-co-do-free-trong-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-on-roblox-group_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/real-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-unlimited-robux-hack-working-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-do-you-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/csbro-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/cc-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/android-coin-master-hack-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_off000030f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F0 22800 bytes
SHA-256: 3591efe51ad9442060ef2157caba450b15a0f08117476aa4b23987ce4289ef96
font_01_sfnt_off000063c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 19376 bytes
SHA-256: f8d6db3bab4a0a4740fc2dd1418d692c845d30ef174c975f22ec5b4335c29ed0

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