Malicious PDF — malware analysis report

Static analysis result for SHA-256 27943df6f776babb…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 06:25:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ea1ad3c8987a761dde4e358d25dc7d31 SHA-1: bf6186d3df1ebbdd87168d40e7444decb4647671 SHA-256: 27943df6f776babb05ecda0b0cc8206a89442e5185e54ac7d2591399f0210d36
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to 'free Robux' or game hacks, indicating a scam or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-robux-scams-game-hack
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-accounts-2021_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/hack-to-get-unlimited-robux-free_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/update-coin-master-free-spins_GM406889139.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/pokemon-go-free-hack-download_GM1094591345.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/roblox-hax_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-create-a-roblox-group-for-free_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-a-hacked-roblox-account-back_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/is-roblox-hacked_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/free-dominus-roblox_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/hack-coins-in-coin-master_GM406889139.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/free-minecraft-games-for-kids_GM479516143.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/free-followers-on-tiktok-no-human-verification_GM835599320.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-vip-on-any-server-on-roblox_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-admin-for-free-on-roblox_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/pubg-uc-png_GM1330123889.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdf
    • https://e-learning.mtsn1bojonegoro.sch.id/__statics/gudangsoal/files/noob-vs-pro-vs-hacker-roblox-blob-simulator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034c2.bin
a2d380d63f4b8a61df22279e247daad6f77f68d6fe9154593a044d2b3078e9c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34C2 22716 bytes
font_01_sfnt_off000067a3.bin
48eef6298bef607355aca425a8072928fe0e0a0bc0ee660e64f251d9c93ff6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A3 18976 bytes

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