Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e4940ba0af2061…

MALICIOUS

PDF

50.3 KB Created: 2021-05-13 04:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 06d5cfc31440a157fab2e9e2a1729a78 SHA-1: dd7914fdcfe151088ea2a7499367d6258824279f SHA-256: 80e4940ba0af20616cacc684002851bdf4912231ee5522d7cd55c9c63bcc4232
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering "free Robux" or "Coin Master spins," presented as hacks or generators. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS model flagged the document with high confidence. The document body and extracted URLs strongly suggest a social engineering lure to direct users to potentially malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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-no-human-verification-game-hack
    • http://spentulib.com/search/repository/spins-coin-master_GM406889139.pdf
    • http://spentulib.com/search//repository/roblox-hack-me-robux_GM431946152.pdf
    • http://spentulib.com/search//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://spentulib.com/search/repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://spentulib.com/search/repository/free-robux-games-on-roblox_GM431946152.pdf
    • http://spentulib.com/search/repository/roblox-free-robux-generator_GM431946152.pdf
    • http://spentulib.com/search//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://spentulib.com/search/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://spentulib.com/search//repository/easy-robux-hack_GM431946152.pdf
    • http://spentulib.com/search/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://spentulib.com/search//repository/free-robux-com-roblox_GM431946152.pdf
    • http://spentulib.com/search/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://spentulib.com/search/repository/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • http://spentulib.com/search/repository/coin-master-hack-app-for-iphone_GM406889139.pdf
    • http://spentulib.com/search//repository/websites-that-give-free-robux_GM431946152.pdf
    • http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://spentulib.com/search//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://spentulib.com/search//repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://spentulib.com/search//repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://spentulib.com/search/repository/minecraft-auto-miner-hack_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b06.bin
1ada219192df2deb9aadef5bb84da956d2d130d67dc4b575ad198a7c58f0ff3e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B06 26504 bytes
font_01_sfnt_off000088e2.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E2 2940 bytes
font_02_sfnt_off000092ec.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EC 5696 bytes
font_03_sfnt_off00009ffe.bin
768a4e91d7c3975acc2b79a699acb909e0f8bbf2befa87684aa1b4f9aecc197e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFE 19028 bytes

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