Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a2d8f35aae4340…

MALICIOUS

PDF

42.9 KB Created: 2021-05-19 10:21:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0852de2dbb9bfc3dbf3319bf60d707b0 SHA-1: 271b83978801d8cf83da48b68e3dc0bf8751074f SHA-256: e2a2d8f35aae4340bf4cdb30c42cc1e1810092bb0b9f49571d39d408e437afd5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a prominent call-to-action, typical of phishing or scam lures. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, many of which point to other PDF documents, suggesting a link farm designed to attract users searching for game cheats or hacks. The ML_NYX_PDF_MALICIOUS classifier strongly 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-roblox-followers-generator-game-hack
    • http://sudamericarural.org/images/rbx-roblox_GM431946152.pdf
    • http://sudamericarural.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://sudamericarural.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master-free-spins-hack_GM406889139.pdf
    • http://sudamericarural.org/images/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://sudamericarural.org/images/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master--hack_GM406889139.pdf
    • http://sudamericarural.org/images/coin-master-free-spins-that-really_GM406889139.pdf
    • http://sudamericarural.org/images/coin-master-free-spins-2021-today_GM406889139.pdf
    • http://sudamericarural.org/images/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://sudamericarural.org/images/free-promo-codes-roblox_GM431946152.pdf
    • http://sudamericarural.org/images/free-robux-com-roblox_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://sudamericarural.org/images/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://sudamericarural.org/images/roblox-www-com_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://sudamericarural.org/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://sudamericarural.org/images/get-free-roblox_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://sudamericarural.org/images/i-got-hacked-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f6.bin
1648afdb65a09fbd2b5887e425b44d8381d5d9bb0bba932b44981deb01698392		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F6 26732 bytes
font_01_sfnt_off000084cd.bin
85a3bc75163aa5cb550fcd7f623674911054c132152be1c6daf8752df38f0070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 18444 bytes

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