Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdca89f635b93cc…

MALICIOUS

PDF

43.7 KB Created: 2021-05-31 12:14:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 953d0407994e7ed7563c316a05dcc123 SHA-1: d2228e6e9f55d95cc3fe70b982d4e5b45f9de064 SHA-256: 7cdca89f635b93cc0c83b1790f83c5246a63742ab8dbae7f9806a1d7314c35d6
102 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a payload from an external URL. The document body and embedded URLs suggest a theme of game cheats and hacks, specifically for Robux and Coin Master. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/free-pins-for-robux-game-hack
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/coin-master-hack_GM406889139.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/get-free-robux_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/minecraft-hack-download_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/minecraft-windows-10-free-with-java_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/roblox-hack-gui-free-download_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/free-promo-codes-for-robux_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/how-to-hack-to-get-robux_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/minecraft-education-edition-free_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/best-free-dances-roblox_GM431946152.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/free-coin-coin-master_GM406889139.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free_GM479516143.pdf
    • https://veyazdesign.pl/wp-content/uploads/fsqm-files/free-tiktok-hearts_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fec.bin
a2f0492ab99e54051871b5ebe2075f005cd97fc9505801168f77a4d504f75416		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEC 24916 bytes
font_01_sfnt_off00008818.bin
74820db914207ad3620b582b3c9eb812b23e13c64f3d3ccc6e156d09930cd5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 18288 bytes

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