Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be3c77dca13c6c5…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 04:54:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 69aaad2d50dfc52ef5dfda0fd68338c8 SHA-1: d743cf7ab5288b0fd7a90a3c02f2627c6a9f23c0 SHA-256: 8be3c77dca13c6c59271216116be21c5068b9b3b9404ce555d20adfcb68e0c43
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to game-related content, suggesting a link farm designed to attract users. The presence of a direct download URL and the ML classifier's high confidence score indicate a malicious intent, likely to distribute malware or lead users to phishing sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a lure for users seeking game cheats or free items.

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-marketplace-free-game-hack
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-human-verification_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-hack-review_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-and-tix-on-roblox-no-survey_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-earn-robux-by-playing-games_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/is-windows-10-minecraft-free_GM479516143.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-download-for-android_GM479516143.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-images_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-marshmallow-head-in-roblox-2021-for-free_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-tiktok-followers-app_GM835599320.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-make-everything-free-on-roblox_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://elearning.mtsn2bolmong.sch.id/__statics/gudangsoal/files/galaxy-roblox-clothes-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003235.bin
d476a6d338951a73eff6cd584fb0658f87d6d305971040f11402f7fd4e84a90a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 22324 bytes
font_01_sfnt_off00006425.bin
2603b895d9ec2f7ea2700d3be8bb2082cd454f2e8a6461c686ac81fbf10a068c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 19296 bytes

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