Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a080d1ed1ff2b5…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 09:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b6bda967c7bc48f31d2877c6f41d1e54 SHA-1: 08552aaac72b3379b7d7786411b0d7c8ac935577 SHA-256: 35a080d1ed1ff2b5768ab6ef952d2d128d0abfbb70d6969ad232d1adbc425436
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a 'PDF_SEO_LINK_FARM', that promise free in-game currency like 'Robux' and 'Coin Master' spins. These links likely lead to phishing sites or pages designed to download further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a scam or distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robux-codes-game-hack
    • http://rsudtenriawarubone.com/perpustakaan/repository/play-coin-master_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-spin-and-coin-links_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-online_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-cheat-apk-free-download_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-get-20-free-robux_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/mcpe-master-coin-hack-apk_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-com-uk_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-robux-gen_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-robux-hack-with-roblox-cards_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-roblox-promo-codes-july-2021_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-earn-robux-on-roblox_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/apps-to-get-minecraft-for-free_GM479516143.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-spin-free_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-buiders-club-free_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-spins-coin-master-haktuts_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/lazyblocks-com-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc5.bin
337652b30ead6264fdc1e3b094140c6dd36a7b93835020353842f87c5a1f0b02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC5 21824 bytes
font_01_sfnt_off00005fbc.bin
7eba4c85ab9fe707c09846c755ad84c22a135a30d3bb5722205a060b3bac6aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 18728 bytes

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