Malicious PDF — malware analysis report

Static analysis result for SHA-256 483d183e85df3886…

MALICIOUS

PDF

33.7 KB Created: 2021-06-22 12:03:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eaa457aca76161678539113067116393 SHA-1: 28fc1f120914c9e73364c1dd1064635ab24e1e40 SHA-256: 483d183e85df38866f01da31e4dcab45395b5f6d14df1bc480681d4e2270ccdf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links, including one to 'netcdn.co', which likely serves as a download host for a malicious executable. The PDF also contains a large number of links to other PDFs hosted on 'pn-singaraja.go.id', suggesting a link farm designed to attract users searching for game cheats and free currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/freerobuxexe-game-hack PDF link annotation
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4 21856 bytes
SHA-256: 82c1b5582030394faa671d592038ba718b99c67772dcf7789fd00030f59cc685
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 18528 bytes
SHA-256: a4e6a74da73f5c2ee30afe030360e9e5b68c7c45967e5ef00201ec3fc3e1e162

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