Malicious PDF — malware analysis report

Static analysis result for SHA-256 465b105e546f60c2…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 16:07:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 21b1b29944a9eda15d9c0a8a05c78816 SHA-1: 8125322097a8f10822d75a398ae8c83656c64002 SHA-256: 465b105e546f60c2509f175ef7a39c1097a99c831b7949d050c895bbd871fe70
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are related to obtaining free in-game currency or hacks for popular games. The ML classifier strongly indicated maliciousness, and the presence of a visual download button lure further supports a malicious intent. The document likely serves as a lure to direct users to potentially malicious websites or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-do-i-get-robux-game-hack
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-new-link-free-spin_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-apple_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-troll-outfits-free_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/daily-free-spins_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-com-2021_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-generator_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/offers-for-robux_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/ac-market-coin-master-hack_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004daa.bin
d6396e1061b7fced4aebdaa313d9dc79f22456cdd65fcf2fb4364a399eb08cd0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAA 25276 bytes
font_01_sfnt_off0000889f.bin
76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889F 18284 bytes

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