Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf3ed1262e1f131…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 00:54:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a9cbc1b46525844f42443986f99b5242 SHA-1: 1edba9ad1384b68b11516783ed9a0d5548c5248a SHA-256: acf3ed1262e1f131c936a5ef68b123a1f00523e6b15a7d249c5c28c001077469
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure to entice users to click on a malicious link, likely to download a secondary payload. The primary URL, http://netcdn.co/app/431946152/how-to-hack-a-game-in-roblox-game-hack, is presented as a way to obtain game hacks. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-a-game-in-roblox-game-hack
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/hack-app-for-roblox-pet-simulator-free-pets_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/byfantics-com-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-t-shirt-design-roblox_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/game-card-roblox-hack_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-code-free_GM479516143.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-hack-thru-premium-houses-in-roblox-pacifico_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-coin-master-spins-links-2021_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-accounts-youtube_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-link-blogspot_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/bux-life-free-robux_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/get-gold-coin-master-village-hack_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/hack-coin-master-dzooka_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdf
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000337a.bin
cd0b6baf7252e657e0bb5825c40506bd04eebcb9a34cc05b9e9299e0fb83b62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x337A 22088 bytes
font_01_sfnt_off00006470.bin
6fce4a2a55f74b8dd0177304c91a4e103d776144475f9be4b3cad9bbfed3a20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 19080 bytes

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