Malicious PDF — malware analysis report

Static analysis result for SHA-256 9321e4e994f75ea8…

MALICIOUS

PDF

33.9 KB Created: 2021-07-01 21:49:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d1aa007cd40ede029dda7a16e7ace9a2 SHA-1: 7e9ec586ff900139f0a2384f51b606eca6e099db SHA-256: 9321e4e994f75ea8d63ddc05cafa11de58b8426b563186a431f2bd82d7315170
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to potential game hacks and free items. The presence of a "download" button heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further malicious content. No scripts were extracted from this sample.

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/roblox-free-without-sign-in-or-login-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/get-free-robux-gift-cards_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/tiktok-free-view-iphone-theme_GM835599320.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/je-de-hacking-sur-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-t-oget-ant-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hack-compt-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-hack-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-mod-version-free-download-2021_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-daily-free-cards_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/bleu-roblox-exploit-free_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/robux-robux-robux-free_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-discord_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-lvl-7-script-executor-2021-august-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-tips_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f3c.bin
b11039398939271a1fec21fdf03df10b07d761e6d36582693f88b72c8900eb8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3C 21556 bytes
font_01_sfnt_off00005e9a.bin
cf5ed924a1643899c435b09fc86a17f88bb29f8ba0524c6ee2581cbb447899a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 19376 bytes

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