Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5a528c77ba1a37…

MALICIOUS

PDF

33.8 KB Created: 2021-07-01 12:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f106e55dddaacc014075b959014b34e4 SHA-1: e6adb6dca33b51009a0f8aa216e3d717a4b3c0c8 SHA-256: 4c5a528c77ba1a373bcdea4f6b9345ecd0b58cce5e0db2b8148c593be9bd76c0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external resources, including one at http://netcdn.co/app/431946152/how-to-create-a-group-on-roblox-for-free-game-hack, which is likely a lure for downloading potentially malicious content. The document body and embedded URLs suggest a theme of obtaining free items or hacks for games like Roblox and Minecraft. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-create-a-group-on-roblox-for-free-game-hack
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-roblox-passwords_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/robux-cheat_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-robux-2021_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/coin-master-hacks-no-surveys_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-robux-codes-generator_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/tiktok-fans-free_GM835599320.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-minecraft-coloring-pages_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-hacks_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d03.bin
abd5e1585cbfb9782cf546cafb47d5ba31c575215288532dc129e8bbf5f440d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D03 22432 bytes
font_01_sfnt_off00005ed3.bin
41ef1b01b9d4385d5fdfd76659a0fc80472a47aee6ea6b95b937e7d547e27496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 19236 bytes

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