Malicious PDF — malware analysis report

Static analysis result for SHA-256 0503ea3d7022de3f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 03:59:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5a825fe8609229551bfb39b8a97dcd6b SHA-1: 51c52a6af44a66f797de935e3cdbbe452ae65518 SHA-256: 0503ea3d7022de3f4f396e01c22e31d264456da783e5e455b35393f1e0f6a4c2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to game hacks and cheats, suggesting a lure for users to download potentially malicious content. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards a malicious link farm designed to redirect users to harmful sites.

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/how-to-bring-in-to-roblox-school-hack-game-hack PDF link annotation
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-murder-mystery-2-modded-free-admin_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/pubg-uc-shop-qatar_GM1330123889.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.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_off000031e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E9 22492 bytes
SHA-256: 674f6c77c5c4d9dba56008fc918e6bf92611d822505720615950c706e978cbd3
font_01_sfnt_off00006440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 19104 bytes
SHA-256: 251f0453d346fc3b2705bf23d47da12daed33f64f972e795f32442106b793992

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