Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2967b75f8e9a5fc…

MALICIOUS

PDF

49.5 KB Created: 2021-06-10 17:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e212c41936c27d988e439bfd25cd908 SHA-1: 49696fc79493980f01729f6de5835b96d4780541 SHA-256: d2967b75f8e9a5fc96b0a5d54b0309578b720a20e64fa30433a71a4e941ae557
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The document contains an embedded URI pointing to a URL associated with 'free robux generator', further indicating a social engineering attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/blox-free-robux-generator-game-hack
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/cheat-codes-in-phantom-forces-roblox_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-code-card-roblox_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-builders-club-accounts-on-roblox_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/prison-life-roblox-cheat-2021_GM431946152.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/free-minecraft-premium-account_GM479516143.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/is-tiktok-free_GM835599320.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hack-roblox-robux-2021_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-roblox-bc_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-advert_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-unicorn-shirt-roblox_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/jjsploit-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d8.bin
d7a1461791966c94e66157e4ad4f5cc79faff3d37e01ff243d5a547cb1b0d740		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D8 27736 bytes
font_01_sfnt_off0000918d.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918D 5596 bytes
font_02_sfnt_off00009e35.bin
04bd76ec466058ec6f5d507018a3bd7b1a95666c036f812cab22441d35aa15e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E35 18420 bytes

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