Malicious PDF — malware analysis report

Static analysis result for SHA-256 906c470e0b3c3192…

MALICIOUS

PDF

41.7 KB Created: 2021-05-18 23:59:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bd5f36da33a096cc898a6cfed5715c8d SHA-1: a8e048fb48e58aa7359bc1d70f14393576560413 SHA-256: 906c470e0b3c3192eefd096bde119f5afc1422f9d41e967d08df57b0b3ddbb78
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to game-related cheats and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to game cheats and a URL that aligns with the link farm's theme.

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/406889139/coin-master-daily-spin-free-game-hack
    • http://boliviagasenergia.com/images/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://boliviagasenergia.com/images/free-attacks-coin-master_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-2021-ios_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-coin-hack_GM406889139.pdf
    • http://boliviagasenergia.com/images/minecraft-free-school_GM479516143.pdf
    • http://boliviagasenergia.com/images/free-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://boliviagasenergia.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://boliviagasenergia.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-pc-hack-download_GM406889139.pdf
    • http://boliviagasenergia.com/images/buxblast-com-robux_GM431946152.pdf
    • http://boliviagasenergia.com/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdf
    • http://boliviagasenergia.com/images/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://boliviagasenergia.com/images/coin-master-free-coins-link_GM406889139.pdf
    • http://boliviagasenergia.com/images/free-spins-for-coin-master_GM406889139.pdf
    • http://boliviagasenergia.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fc.bin
93b6fcf89aafe56cc02cd1fff2b8e4d26bb95b14a65c1ab6c05c60826597bc65		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FC 24076 bytes
font_01_sfnt_off0000809c.bin
213ea0fed5678e19eff32fcc5d46e69a4f1b73f67043b57a178cf12547108d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809C 18308 bytes

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