Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c66984f5b92a32b…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 20:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 68637c646b8afab1d1544a3b02365515 SHA-1: d6ac34b818fe9e4cbd2059446fed1264cba6c057 SHA-256: 7c66984f5b92a32ba28c6d255c4df0b997ce38beef7e549a30f4a403e48a0542
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-roblox-accounts-2021-easy-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-roblox-accounts-2021-easy-game-hack PDF link annotation
    • http://goodacreuk.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://goodacreuk.com/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://goodacreuk.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://goodacreuk.com/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://goodacreuk.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://goodacreuk.com/images/oginject-co_GM406889139.pdfIn PDF document text
    • https://collectrobux.coIn 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_off0000491c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491C 26064 bytes
SHA-256: 8e6c99597b1d8f433711737f10b21562384e66f589efeabaa8c63bb2e897503a
font_01_sfnt_off000084a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A7 19172 bytes
SHA-256: 0a4c192dd0d49b475d670e2028b2e3d9bc88486e58824ff416e2d46c0acce708

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