Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae91bfbf317fbca1…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 08:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f798ef5c6f2912c641fcfff6d5cdf25e SHA-1: 4c685e40a44eb5e3e087fbef1a39b063715b90c0 SHA-256: ae91bfbf317fbca1ef61ab99d14d1c12e99267958359018ce68ed670911f2c94
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or human verification prompt to lure the user into downloading a file. It contains an external URI pointing to a suspicious URL, likely intended to host a malicious payload. The document body and embedded URLs suggest a theme of free game currency or downloads, a common lure for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/free-spin-and-coin-blogspot-com-game-hack
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/easy-way-to-get-robux_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-roblox-characters_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-coin-master-gold-cards_GM406889139.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/xray-hack_GM479516143.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/robux-offers_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/minecraft-pe-hack-client_GM479516143.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-blogspot_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes_GM431946152.pdf
    • http://elearning.mtsn1banjarnegara.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab5.bin
ef453f16b201be58d95de619fdb1103e82d3a7df27cf9098bb834f1b63fa3ef9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB5 24560 bytes
font_01_sfnt_off00008331.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8331 3380 bytes
font_02_sfnt_off00008f1a.bin
8c60560f4ae8b9a96d4078b3ef6dfb307c9e4974d6ab2cc1a47a3a2c49762880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1A 18668 bytes

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