Malicious PDF — malware analysis report

Static analysis result for SHA-256 f832355febcb5911…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 01:57:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 631b2980ca6ff4c6be5ca9aa8cb8f2a2 SHA-1: e04458ec7af30f2bab85ab4ac628cdec4ef4b4e2 SHA-256: f832355febcb5911474010a00cf1878ee61a29c8fc8941496b290d7f5283ceda
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are presented as links to game-related cheats and promotional codes, indicating a lure for users to download potentially malicious content. The ML classifier and the PDF link farm heuristic strongly suggest malicious intent, likely involving the exploitation of users seeking in-game advantages. No scripts were extracted, but the presence of a large number of external links points towards a downloader or exploit delivery mechanism.

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/rolox-promocodes-for-robux-no-hack-no-waiting-game-hack
    • http://perpustakaan.pa-dompu.go.id//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/pubg-uc-seller-pakistan_GM1330123889.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-not-fake_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/hack-pour-tre-deban-sur-roblox_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-coin-master-gift-link_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/freerobuxcodegenerator-roblox-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/comment-hacker-le-cataloggue-de-roblox-2021_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/free-spins-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/can-a-roblox-gift-card-give-free-robux_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/robux-generator-com_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/hack-coin-pro-coin-master_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-hacks-18-9_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-high-school-2-money-cheats_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-coin-master-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef7.bin
a8bfb1e224dc440bd20eff19b0de7d5b16385cb0a7ae7958a57d9157da43e68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF7 21328 bytes
font_01_sfnt_off00005d5d.bin
29306aa043590a5e59a61ac89c55ee0aba36b590af05b9900d60f2c823a26d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5D 19972 bytes

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