Malicious PDF — malware analysis report

Static analysis result for SHA-256 2109630999a98ad7…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 15:56:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: da3b7e98147ed7bed2e24d64d7757d61 SHA-1: 42ca0abb0b8dc4476bfb317766ff0cb839b2b9fa SHA-256: 2109630999a98ad7fb95cabd089d5732b376ab9452fbbda653e026ebd4c96a2e
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links and a primary URL pointing to game-related 'freebies' which is a common lure for malware distribution. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to attract users searching for such items. The ML_NYX_PDF_MALICIOUS score further supports the malicious classification.

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-roblox-redeem-codes-2021-game-hack
    • https://www.gvandenakker.nl/images/free-robux-youtube_GM431946152.pdf
    • https://www.gvandenakker.nl/images/free-spins-from-coin-master_GM406889139.pdf
    • https://www.gvandenakker.nl/images/free-robux-on-iphone_GM431946152.pdf
    • https://www.gvandenakker.nl/images/onnet-roblox-hack_GM431946152.pdf
    • https://www.gvandenakker.nl/images/how-to-get-2021-robux-for-free-proff_GM431946152.pdf
    • https://www.gvandenakker.nl/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • https://www.gvandenakker.nl/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • https://www.gvandenakker.nl/images/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://www.gvandenakker.nl/images/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://www.gvandenakker.nl/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • https://www.gvandenakker.nl/images/free-robux-master_GM431946152.pdf
    • https://www.gvandenakker.nl/images/free-minecraft-java-code_GM479516143.pdf
    • https://www.gvandenakker.nl/images/free-admin-thumbnail-roblox_GM431946152.pdf
    • https://www.gvandenakker.nl/images/coin-master-game-hacking-tricks_GM406889139.pdf
    • https://www.gvandenakker.nl/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://www.gvandenakker.nl/images/robux-generator-no-survey_GM431946152.pdf
    • https://www.gvandenakker.nl/images/free-tiktok-followers-no-verification-or-survey_GM835599320.pdf
    • https://www.gvandenakker.nl/images/how-to-get-free-tiktok-fans_GM835599320.pdf
    • https://www.gvandenakker.nl/images/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://www.gvandenakker.nl/images/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d7.bin
90ed49899b27927acbff87604852d49757eea5511483440337b7f862738da713
pdf-font-stream PDF embedded font (sfnt) at offset 0x30D7 22268 bytes
font_01_sfnt_off0000624e.bin
c429b30c83d7296a1caac891a7026f482295a052102192f0ead34cebb0016577
pdf-font-stream PDF embedded font (sfnt) at offset 0x624E 19300 bytes