Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dcd620838d6b30…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 05:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e1656a090854b213e1c57d63a496f33 SHA-1: 3c9a74f8376ff8075a1905a7d2e02c27f90b0e19 SHA-256: c2dcd620838d6b30847ba676fe286f0c6ce44f754f765dfd2ab4eaa635b61271
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, many of which point to other PDF files, suggesting a link farm designed to distribute malicious content. The document body and embedded links indicate a lure related to game hacks and cheats, likely to trick users into downloading malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, potentially leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hack-treasure-hunt-simulator-roblox-game-hack
    • http://perpustakaan.bkkbnkaltim.id/repository/robux-converter_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-card-collection-hack-apk_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-groups-2021_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-spin-coin-master-link-today_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/javascript-free-robux_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/real-robux-generator_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-hack-september-2021_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-tiktok-accounts-and-passwords_GM835599320.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/pubg-uc-gift-card_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005189.bin
d465e1f5dc1859038e2c493aa4e731af1b389c71a2919c55039e435e959d2392		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5189 25472 bytes
font_01_sfnt_off00008bed.bin
d9ad51dbb0541a5763bdb7419543fa91b76ed2a0f3bf9dd32d0c08c467baddce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BED 18808 bytes

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