Malicious PDF — malware analysis report

Static analysis result for SHA-256 694e68b301932cf6…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 15:22:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1b5cdf5f33deb8f7b7122d8142515f72 SHA-1: 4094accb5d8d1242792aa6a895d6a17585a1422c SHA-256: 694e68b301932cf6b0f1a47a945f445099705fbb6bb28598ec7ce5af933f1ae6
82 Risk Score

Malware Insights

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

The PDF document impersonates the "Coin Master" game to trick users into downloading a file from a suspicious URL. The heuristic "SE_BRAND_CREDENTIAL_PHISH" indicates brand impersonation, and the "PDF_URI" and "EMBEDDED_URL" findings highlight the external link used for the malicious download. The ML classifier strongly flagged this PDF as malicious, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/406889139/coin-master-hack-ios-download-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/406889139/coin-master-hack-ios-download-game-hack PDF link annotation
    • http://maestriadental.com/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/rbxoffers-earn-free-robux_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
stream_003_off00004808.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4808 25272 bytes
SHA-256: b0fd30036fd52c44b052f6cf7c7a74799ce5f88ff2c2c0e7a0c8e3208616743b
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 18296 bytes
SHA-256: abb5dc3882d33bb675e42633b9ef907b5fa8a8f8ffe877e273a1ba74b2e79714

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