Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6698990fb711467…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 13:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 45317f55ab9e7faea536103d4713fd13 SHA-1: 1c79b9872ebfe56e3a1b0b03270818c226634c2e SHA-256: e6698990fb71146771994cae9619a9604c0b89ad3b0e8de6d6b0c2ffc313f2b1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.9971

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-get-infinite-robux-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-get-infinite-robux-game-hack PDF link annotation
    • http://sbm-nn.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/100-hack-coin-master_GM406889139.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_off00004949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4949 25280 bytes
SHA-256: 4daa39493d36dd6bf5e45bebed2537d6e5a08d47b945293eb025d80a43a89bac
font_01_sfnt_off00008169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8169 18236 bytes
SHA-256: 8217e2720e15cc92b3bb050ea8e30655d207dd8077634fd20a14500b8eab7772

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