Malicious PDF — malware analysis report

Static analysis result for SHA-256 846ee658bb36ce7c…

MALICIOUS

PDF

38.3 KB Created: 2021-05-22 11:48:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94ff647b6974f3a4e100d3151f5d299f SHA-1: f02d33c123083f1de8f28c3b160be5b24f90c688 SHA-256: 846ee658bb36ce7c64fe6064da00692e3b1fd33e764c30cbf487c5fb7e8b705b
222 Risk Score

Malware Insights

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

The PDF document employs social engineering tactics, including a fake CAPTCHA and advance-fee scam lures, to trick users into interacting with malicious content. It contains multiple embedded URLs, one of which, 'https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-game-hack', is likely intended to download a second-stage payload. The document's structure and heuristics strongly suggest a ClickFix attack pattern designed to bypass security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

Heuristics 7

  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/479516143/how-to-get-minecraft-for-free-game-hack
    • http://www.inoxograde.hr/files/cute-free-roblox-outfits_GM431946152.pdf
    • http://www.inoxograde.hr/files/tiktok-free-view-editor_GM835599320.pdf
    • http://www.inoxograde.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://www.inoxograde.hr/files/minecraft-java-edition-key-free_GM479516143.pdf
    • http://www.inoxograde.hr/files/minecraft-112-hacked-client_GM479516143.pdf
    • http://www.freenom.comHey
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000332d.bin
9fe11fd8bf86aee9c47a4337300bec2de67c00fa4ed1714e2cef38014e3d4af4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332D 24920 bytes
font_01_sfnt_off00006bf5.bin
972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 2820 bytes
font_02_sfnt_off00007594.bin
6fa695b9296659f7eb743de2dcac64eb87e125e0d99966acf8bb7a2f268f66d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 17872 bytes

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