Malicious PDF — malware analysis report

Static analysis result for SHA-256 8382d9ccbe3d143d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 23:50:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f611078b32a542d50bf0866592130008 SHA-1: 258d3c3dc29f16a4fbf39541f427d08e71ddb472 SHA-256: 8382d9ccbe3d143d5b98a0de3af4b512a1e7eac3254382d78bc0a0927c7cb7bc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to lure users with promises of free Robux and game cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading unknown content. The primary attack pattern involves directing users to external sites that likely host malware or phishing content.

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/free-robux-made-by-roblox-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-real-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-gamepasses-for-free-on-roblox-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/hack-vehicle-simulator-roblox_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-codes-in-roblox-bee-swarm_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/counter-blox-roblox-offensive-hacks-wall-hacks_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-site_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-gen_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-f12-cheat_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/jailbreak-roblox-hack_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-add-only-today_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/vip-roblox-free_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-unlimited-robux-generator_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/pastebin-how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-jailbreak-hack-2021_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/sb-game-hacker-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-apk-download_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-do-you-get-free-robux-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cfa.bin
59d8e06648fe4a041fed4fcb2abe75d5cfa08e66ca88edbe4c836b85e9a2de26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFA 22372 bytes
font_01_sfnt_off00005ec1.bin
b700c0ee6f68e903a504a86ac5483de96dc2af47738efc73071322d002bf8754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 19340 bytes

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