Malicious PDF — malware analysis report

Static analysis result for SHA-256 6166ab5cf9de5801…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 14:28:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8db37e0acf79d8c406dd8ed99ea5e8cf SHA-1: 09c13e787a23aec382122729c3885fe4822bcbe0 SHA-256: 6166ab5cf9de58018d9c04ecfe3445af0177a289baece98531913204a5a9d51b
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to SEO-optimized PDF files, indicating a link farm or traffic generation scheme. The presence of a 'download button' lure and a high ML classifier score further suggest malicious intent, likely to direct users to download malware or engage in phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/minecraft-pe-free-download-ios-game-hack
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-no-root_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-50-spin-link_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/pubg-uc-add_GM1330123889.pdf
    • http://perpustakaan.idia.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-trick-2021_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://perpustakaan.idia.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • http://perpustakaan.idia.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005349.bin
644d2cb3c3d7e1c9fbfb0a2f7e8080ddb4d1e86ad12f23306f7d3248cdfb11f2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5349 28300 bytes
font_01_sfnt_off000091d3.bin
9eeecdfb23f1efa52cb61da16af6a6becaf737d5b15e06d56d5bb9cda3007ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D3 18444 bytes

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