Malicious PDF — malware analysis report

Static analysis result for SHA-256 5086745ad588e2cb…

MALICIOUS

PDF

44.2 KB Created: 2021-05-17 14:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a6d1b913ec1ed7e380ad630e2c2abbbd SHA-1: f808a3d699cc1b7caac8df1c680875e08382c422 SHA-256: 5086745ad588e2cbcb8151258781de1551e491d899c2eb0637969b083b386135
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free Robux and game cheats, indicating a lure for users to click on potentially malicious links. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of external links were generated, likely for SEO manipulation or to distribute malware. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-codes-game-hack
    • http://sudamericarural.org/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://sudamericarural.org/images/get-free-robux-info_GM431946152.pdf
    • http://sudamericarural.org/images/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://sudamericarural.org/images/where-to-get-free-robux_GM431946152.pdf
    • http://sudamericarural.org/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://sudamericarural.org/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://sudamericarural.org/images/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://sudamericarural.org/images/games-like-minecraft-but-free_GM479516143.pdf
    • http://sudamericarural.org/images/free-spins-coin-master-links_GM406889139.pdf
    • http://sudamericarural.org/images/bit-ly-coin-master-hack_GM406889139.pdf
    • http://sudamericarural.org/images/free-spin-coin_GM406889139.pdf
    • http://sudamericarural.org/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://sudamericarural.org/images/infinite-robux_GM431946152.pdf
    • http://sudamericarural.org/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://sudamericarural.org/images/can-you-get-robux-for-free_GM431946152.pdf
    • http://sudamericarural.org/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://sudamericarural.org/images/roblox-devil_GM431946152.pdf
    • http://sudamericarural.org/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://sudamericarural.org/images/coin-master-hack-fast-org_GM406889139.pdf
    • http://sudamericarural.org/images/free-robux-group_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e6.bin
5293108478167b03effdf06db267f006db56bd27f16ffe15ce29034837fe1ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48E6 24760 bytes
font_01_sfnt_off00008091.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 2844 bytes
font_02_sfnt_off00008a52.bin
7763b0eba74f003993d6ddc379ef756dfeeff7cedd1b34d70c41f8674d393ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 18188 bytes

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