Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d5607dcffcbe6f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 18:59:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9792d804bbb521ae3c499b0cdceec381 SHA-1: 5428c36b00f4cdcc45b454ce33816dce80ee2b2f SHA-256: c0d5607dcffcbe6f1c6ac89a15fc083a1271d8ba45785f15b75bca558388b66b
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a 'download button' lure, indicating an attempt to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm with SEO-optimized titles related to game hacks suggests a social engineering tactic to distribute further 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/how-to-hack-admin-roblox-game-hack
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/como-hackear-cuentas-en-roblox_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/roblox-shirt-template-free_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/roblox-how-to-enter-cheat-codes_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-20210-robux-on-roblox-free_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-android-no-root_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/roblox-hack-bars-2021-for-pc_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/dll-inject-hacks-roblox_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/dora-creates-a-free-robux-scam_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/hacks-para-coin-master_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-in-roblox-waitseds-no-time_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-code-genorator_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/pubg-uc-20210_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030de.bin
9f58b470b52adb1c87f51102805bb772fe0758d7d2104e1796bfffed7a2bce5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 22604 bytes
font_01_sfnt_off00006331.bin
3a816fbab3463d24f85e6a31118b32dc925dbc72160e0ffeb40511715023c24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 19376 bytes

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