Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e130bd0f73b1a5…

MALICIOUS

PDF

34.7 KB Created: 2021-07-01 20:12:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fd6bc4bcb7bafd8cfcc8ad18b936cbe6 SHA-1: e254aef3f5bea630dd1ebd37b5be8cad08bace68 SHA-256: b4e130bd0f73b1a5f42b3428fb790b12f4ee0c4ec84a5e70fd23cfb59ed8e915
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary external link, all related to obtaining free in-game currency or hacks for popular games like Roblox and Minecraft. The heuristic firings indicate a link farm designed to direct users to external resources, likely for malicious purposes such as malware distribution or phishing. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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/box-get-free-robux-roblox-game-hack
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/bloxbird-roblox-franais-free_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-hack-yourself-free-robux_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-2021_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-games-with-free-boombox_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/minecraft-free-online-games_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-hack-levels-dragon-ball-z-revalations-roblox_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/wie-kann-ich-robux-hacken-website-liste_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-automatically_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c6.bin
f42b5e46629c34c45ac44b5398d23ddc2bcdeafaccafa18a085183e1dab2af19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C6 22496 bytes
font_01_sfnt_off0000630e.bin
86c4a8bac4a44ef0eb15ca2fb03494312896c65be8d9d06016b37d29e0a82404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 18896 bytes

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