Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b3b0a073c3d9ab…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 05:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6749aaf84fb91aa3f4af8a67fe6d979b SHA-1: 34fe2b2223b1311bd63740c11681578eb43d5cbd SHA-256: e5b3b0a073c3d9abd644df8dfa5dcc1d194a8f361d84dbbb91da79a86677cadd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that attempts to lure users with promises of 'free Robux' and game hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-hack-game-hack
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-coin-master-gift-link_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-sexually_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-2021_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/legit-coin-master-hack_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-hack-spins_GM406889139.pdf
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/minecraft-hack-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c02.bin
287a03b0e3d4aad15ea68cb1ed6aff0f5ba8df45bb79868195e0f3b1c9d081e0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C02 25184 bytes
font_01_sfnt_off0000858d.bin
8090616d8a5c0701bec53dfbbcc7430816d9db69864bd7c9067c717eb12c26b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858D 18412 bytes

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