Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cab796b595de6e9…

MALICIOUS

PDF

46.5 KB Created: 2021-05-18 03:10:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 67f3c142f1298cea56c095da878678e7 SHA-1: 09b61b9d7fce784fe3e190d685306bf00f7df193 SHA-256: 4cab796b595de6e92123209ddbc337d67a5b55d8c7434aeae7e7453627a5a1e7
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 0.8948

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-do-you-get-free-roblox-money-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-do-you-get-free-roblox-money-game-hack PDF link annotation
    • http://bemviverclin.com.br/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BE 27060 bytes
SHA-256: 249171095172c1e7a7a04cb34362980de7195d30ce9f803026322bb357f18c84
font_01_sfnt_off00008679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 3004 bytes
SHA-256: 93845cfab9436bdf1c990d8c9529434f95da71389e8e4e7b85b1f8371b1c81e7
font_02_sfnt_off000090de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DE 19064 bytes
SHA-256: 94f9efcc29addd786a26302115b4c31227e6eded102cc07b8eb042232f1d4f5b

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