Malicious PDF — malware analysis report

Static analysis result for SHA-256 563c6256e6da635c…

MALICIOUS

PDF

49.0 KB Created: 2021-05-16 09:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0288505d45a51f9b1b7b0087178d1255 SHA-1: 34d1b3731ef3711186dc97ea03f41cc9cc84b378 SHA-256: 563c6256e6da635c73fd885bab74d895ff5bb2ee4fcfa2d585a2ca430126c7f2
122 Risk Score

Malware Insights

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

The sample is a PDF document that impersonates Netflix to phish for credentials, using a fake CAPTCHA lure. It contains an embedded URI pointing to a malicious URL, and multiple other URLs that are likely part of the same campaign. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-hack-someone-on-roblox-game-hack.
  • 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/how-to-hack-someone-on-roblox-game-hack PDF link annotation
    • http://www.europeancamerata.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/get-me-robux_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A80 37816 bytes
SHA-256: 0ee1064a13753b3f7559d8c6a207fe04005cfd83d4c8a0cb40ca34ee04f896ae
font_01_sfnt_off00009caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAF 18608 bytes
SHA-256: eebf4fd0ce8e014a693b7448b6f63c7fd528199174cddc1a90a23252bff1a633

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