Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f1d5041889c758…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 14:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2f32a18a4b5a7326c61e2abe312c668e SHA-1: 6ab7049a0746db4d83d5b4ca0dd88c09c988111f SHA-256: 10f1d5041889c758b34fa1af9895198f0e0c864d101d593740f5e29182b3344c
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 structured as SEO link farms, suggesting an attempt to direct users to malicious content. The document body and extracted URLs explicitly mention 'free Robux' and game-related cheats, indicating a social engineering lure. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to exploit users seeking in-game currency or cheats.

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.tw/app/431946152/roblox-group-free-robux-game-hack
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-get-free-robux-games_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-fucking-get-free-robux-2021-real-omg_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/does-the-roblox-hack-work_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-card-collection-link_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/tycoon-money-cheats-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-spin-coin-master-new-link_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-connection-lost-hack_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/pokemon-go-free-100-iv_GM1094591345.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/robux-kingsml-free-robux_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/best-free-minecraft-skins_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/roblox-generator-no-human-verification_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-developer-console-hack_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-hacking-website_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/inject-hack-roblox-free-robux_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-minecraft-maps-pe_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000308c.bin
3304f4e5edd8a78edbca46a98be8fd76d4d9315a82328e9cedb883dfd60a74db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 22516 bytes
font_01_sfnt_off0000622e.bin
f48b2ae17e84399e3a6b420fde02f8f729f2240ca84fd7cf9c0f4aab3f14a6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 18968 bytes

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