Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ad331eca625cfe…

MALICIOUS

PDF

46.6 KB Created: 2021-05-31 19:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 232efd214e93d11c15b66b08717795d6 SHA-1: be9ef98e49a9f00f4e846e849d8457d8ccde438d SHA-256: 03ad331eca625cfe0d54d226a9c5dac6f3292eeec8eb1749761342bdc9c9e3da
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links disguised as download opportunities for free Robux and game hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of such links, and the ML_NYX_PDF_MALICIOUS score is very high. While no scripts were explicitly extracted, the structure and content strongly suggest a phishing or malware distribution attempt via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.xyz/app/431946152/rbxcity-free-robux-instant-payout-game-hack
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-the-marshmallow-head-in-roblox-for-free_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-real_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-downloading-games_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/roblox-hack-game_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/can-you-get-roblox-on-xbox-one-for-free_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-no-verification_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/coin-master-free-daily-spins_GM406889139.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/hack-engines-for-roblox-swordburst-2_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-coins-coin-master-2021_GM406889139.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/tiktok-followers-for-free_GM835599320.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-hack-coin-master_GM406889139.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-no-verification-needed_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/free-robux-hack-on-laptop-july-2021_GM431946152.pdf
    • https://srmap.edu.in/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050ba.bin
9adb1ba6a4c8ad606063ac93ff68785f717589de74c13d0535f581c111de4242		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BA 27896 bytes
font_01_sfnt_off0000920d.bin
e18c131877a3e485c30816d39596061e12b91d2115cc30725f295a196a2c2bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920D 18800 bytes

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