Malicious PDF — malware analysis report

Static analysis result for SHA-256 570aa2a0807739df…

MALICIOUS

PDF

46.0 KB Created: 2021-05-19 23:11:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1ef51b0e6d132af229532e50d214565f SHA-1: 1e5a35c8314420ae50a88c2210a8c879740a77fe SHA-256: 570aa2a0807739df29c0a534ce4aa809a9f80d56c5d0bbeada32e4d4cbb56a51
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external resources related to game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm designed to attract users with promises of free in-game items or cheats. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into clicking malicious links. The primary URL identified is https://netcdn.xyz/app/431946152/roblox-online-free-no-download-game-hack, which likely serves as a landing page for malware or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/roblox-online-free-no-download-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004904.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4904 27012 bytes
SHA-256: 3538cdfa386f272681bf96ef37e1e32e21fe061a14245389b70710dc00e9218a
font_01_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB9 18804 bytes
SHA-256: 6fb5cf719d1be48a9d1666bba8fc7670265b54a481b05bd95291926c1d5df909

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