Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec454264b76e22d…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 14:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3f9d662b51b485564268c872106059f3 SHA-1: 326cb18b86be7d3b0a4292aebf16c08299f0610d SHA-256: 8ec454264b76e22dd062fb1a4b0df653edc238e34b9dcaa6a47f2f98a025362a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/431946152/actual-free-robux-game-hack PDF link annotation
    • http://118.98.227.172/opac/repository/how-do-you-get-lots-of-robux-for-free_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/roblox-free-account-generator_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-website-no-password_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/auto-clicker-for-roblox-mac-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-card-codes-unused_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/inquisitormaster-the-new-roblox-hacker-is-after-me_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-do-i-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-any-amernation-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-using-email_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-fashion-frenzy-free-online-game_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hacks-for-legends-of-speed-roblox-download-pc_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-rebux-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-no-human-verification-and-no-survey_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_off000032df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF 23128 bytes
SHA-256: 5cc4513bb5e86379a78898d5391d9baef03e99efab1960b5775202eb61c0414d
font_01_sfnt_off000066f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F7 18896 bytes
SHA-256: bd3de038992f776bb75c9d87ab01591e9a87ca5e55efa1086dfb4f2335c858c6

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