Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa58c72268b2152…

MALICIOUS

PDF

47.0 KB Created: 2021-05-16 23:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 08f3532445883f8693f8b30c53a03284 SHA-1: 5173c5ae5fd71bc4d656519b3f05a1495c522537 SHA-256: 1fa58c72268b21528f9a6628358c03a7b796d78b51f27284da41d0e57c2be79b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are SEO-optimized and point to sites offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a call-to-action button further supports a malicious workflow. The document's primary purpose appears to be directing users to download potentially harmful files disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/robux-in-game-hack
    • http://kontaktadig.se/images/how-to-get-free-robux-app_GM431946152.pdf
    • http://kontaktadig.se/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://kontaktadig.se/images/coin-master-spin-link-free_GM406889139.pdf
    • http://kontaktadig.se/images/coin-master-real-free-spins_GM406889139.pdf
    • http://kontaktadig.se/images/free-roblox-executor-no-key_GM431946152.pdf
    • http://kontaktadig.se/images/can-u-get-free-robux_GM431946152.pdf
    • http://kontaktadig.se/images/coin-master-free-spins-only_GM406889139.pdf
    • http://kontaktadig.se/images/coin-master-official-fan-page_GM406889139.pdf
    • http://kontaktadig.se/images/coin-master-pc-game-free-download_GM406889139.pdf
    • http://kontaktadig.se/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://kontaktadig.se/images/coin-master-hack-online-2021_GM406889139.pdf
    • http://kontaktadig.se/images/master-coin-hack-apk_GM406889139.pdf
    • http://kontaktadig.se/images/oprewards-free-robux_GM431946152.pdf
    • http://kontaktadig.se/images/roblox-rape-hack_GM431946152.pdf
    • http://kontaktadig.se/images/hack-coin-master-without-human-verification_GM406889139.pdf
    • http://kontaktadig.se/images/free-robux-generator-without-human-verification_GM431946152.pdf
    • http://kontaktadig.se/images/coin-master-free-spin-app-reviews_GM406889139.pdf
    • http://kontaktadig.se/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://kontaktadig.se/images/coin-master-free-100-spin_GM406889139.pdf
    • http://kontaktadig.se/images/mcpe-hack-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1a.bin
c5adf9f29faf67178c589f85bf2e9f2fe6ab699e9728c5ade8f0537d8f9d05a5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1A 32892 bytes
font_01_sfnt_off000096ea.bin
7ee051f4e2d26a9a04c66646782e9314ee13ce973b90acfdb1eca38aa40a5769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96EA 17852 bytes

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