Malicious PDF — malware analysis report

Static analysis result for SHA-256 60511cb2225330b4…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 18:53:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 05e17396fafff61dae0dadc2d67e4895 SHA-1: bdcf49bb3592de89a7a7a5849911c27de88aa8d0 SHA-256: 60511cb2225330b421b7853588622ac7dc539c60b9d86a4d240ca40b275e3e4e
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 SEO-optimized PDFs promising free in-game currency or hacks. The primary URL, http://netcdn.tw/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack, suggests a lure for users seeking free Robux, likely leading to a phishing or malware download site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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-generator-2021-no-human-verification-or-survey-game-hack
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/cute-free-hair-on-roblox_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/blox-fun-info-free-robux_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-real-hack_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-el-tiger-card-free_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-roblox-groups-with-funds_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_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/minecraft-free-download-apk-softonic_GM479516143.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-pc-download_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-gun-script-hack_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-premium-free_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-redeem-code_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-cs-go-aimbot-hack_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-codes-for-robux-2021_GM431946152.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-gifts_GM406889139.pdf
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/robux-rewards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033a9.bin
54875d3f404c39c37a974e1f4fd9ce5d07a181c62f09bd2c61eb09e4485ad005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33A9 21964 bytes
font_01_sfnt_off0000644d.bin
c95f599563a13a8661a8d912b5a9bb1906bac0583db2f84c1a9fc087aebca576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 20028 bytes

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