Malicious PDF — malware analysis report

Static analysis result for SHA-256 858575a36ec7401f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-28 21:18:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 78f04bd24e85a98295c7bca103d0e202 SHA-1: afd20c4bd5aca44086f26db33ceee1f2c4817c7c SHA-256: 858575a36ec7401fcd220fac7fa1b0d57695f15eb4f11e284b0c349c8f13ff50
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links or downloading further payloads. The embedded URL, http://netcdn.co/app/431946152/how-to-get-actaully-hacks-on-roblox-not-a-model-game-hack, likely leads to the download of a second-stage malicious file. The ML classifier also strongly indicated maliciousness.

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-get-actaully-hacks-on-roblox-not-a-model-game-hack
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/boostgamesnet-roblox-free_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-unicorn-code-roblox-2021_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-obby_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-admin-script-hack-pastebin_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/como-ser-hacker-en-roblox-meepcity_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-t_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-no-hack-no-survey-no-human-verification_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/block-hunt-hack-roblox-pastebin_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-characters-without-robux-2021_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/bhop-hacks-roblox-2021_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-vip-server-free-links_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-roblox-redeem-codes-10_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000310e.bin
44e908591eeb2fbd9a65a852e515a365b0bac45129fa5ecac7aadc39d8c20d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 22904 bytes
font_01_sfnt_off0000644d.bin
4f5a0e2f85c794a0d3db019e65d11cf3d7d10becc88db7f0a97154f0eae98273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 19616 bytes

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