Malicious PDF — malware analysis report

Static analysis result for SHA-256 446f03421c07977b…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 02:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e5dd39abcfb1b4bf0ffecf6523cd8f0 SHA-1: 9ac303bdb9c55d633671cdff58696fac8ce44878 SHA-256: 446f03421c07977b2487222c277bb8ccad0f10a882b5728d46d2a7f3cd20ac8e
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms. The document body and extracted URLs suggest a lure for 'free Robux' or 'free spins', indicating a scam or phishing attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-2021-no-human-verification-game-hack
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-rewards-free-spins_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-spin-gratis-coin-master_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-earn_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-domain-for-minecraft-server_GM479516143.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/minecraft-build-hacks_GM479516143.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coinmaster-fan-page_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/fan-page-coin-master_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/robux-free-2021_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/roblox-cp_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-online-hack-link_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/my-roblox-account-was-hacked_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/i-want-free-robux_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/free-roblox-characters_GM431946152.pdf
    • http://perpustakaan62.smkn62-jkt.sch.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b22.bin
6e6137e51a3fbd62ab81af24ae2374cfc1b786c3e2bdc052ae09286c70f907ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B22 25380 bytes
font_01_sfnt_off000084f7.bin
a5b009a33d06eb91b5687aca452054299973906144ac3f9b2fc2dd0e2fef1dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F7 19260 bytes

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