Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d1bb679d9a133d…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 05:13:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 04b6d7159299f0a9382a17a0ccc669ca SHA-1: f219657acb194396b282ce849a50c87aa248a389 SHA-256: 44d1bb679d9a133d0d37e6fc14a49a241252415113ae69cfb83d808faf352b39
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, likely intended to trick users into downloading further malware. The presence of a large number of SEO-optimized links pointing to game cheats and hacks, along with a visual download button, suggests a phishing or scamming attempt. The ML classifier strongly indicates malicious intent, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious link structure.

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/oprewards-robux-game-hack
    • http://library.itekes-bali.ac.id/repository/free-robux-pastebin_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-royale-high-accessories-hacks_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/cheat-roblox-laxify_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/best-shirt-roblox-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-how-to-get-in-bloxburg-for-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-get-free-online_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-hack-client-download_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-gift-card-codes-2021-generator_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-games-that-actually-work-june-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-redeem-roblox-card-for-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-project-jojo-stand-hack_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-meep-city-free-plus_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-free-unblocked_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-studio-app-free-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000337c.bin
0730a3f2d29aceb318b6d0edb3934f4f3d3b3a393cb46b94901741f9091601bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x337C 22864 bytes
font_01_sfnt_off00006638.bin
9248ed4d3d54ba3ef19613beb3441d29a31be10cd8ccf75546374223402ff5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 19068 bytes

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