Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e5bfe6ba853839…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 02:10:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: badf990f4b587e58ca3379529dbc97a8 SHA-1: e996fa01944cb6781bcbb1f3a0cdbb4c879d989b SHA-256: d9e5bfe6ba8538393b038e2c914fe4ef477ab2cd9ecfcc0ed26da29a44572c46
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a direct link to 'http://netcdn.co/app/431946152/roblox-robux-hack-2021-game-hack', suggesting a lure for users to download potentially malicious content. The presence of a 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, many of which are SEO-optimized PDF files, further supporting the malicious intent of directing users to external, likely untrusted, resources. The ML classifier also strongly flagged this PDF as malicious.

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-robux-hack-2021-game-hack
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/idsk-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-avatar-maker-free_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-invite-friends-free-spins_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/daily-spin_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-thumbnail-maker-free_GM479516143.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-rewards-link_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/get-robux-now_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-tiktok-followers-no-survey-or-verification_GM835599320.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/proxy-hack-roblox_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-really-easy_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/vortex-premium-key-free-roblox_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-shoulder-accessories-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_off0000312b.bin
9ace9bc8d466dc1287efe3106d5a6062d9d81f61b8228743f03ef478ddfa6fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 22184 bytes
font_01_sfnt_off00006234.bin
4e3810ced9f2e8ed4edafe04c8aee32588de8a86c5d50b30939fb02d4dd8ed6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 19200 bytes

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