Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e14f4620f5f0d3…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 01:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d198a7830137bf33f7cad3ed05f4f727 SHA-1: 8971d9e1b1d35780998f8b5147975322c4349159 SHA-256: b5e14f4620f5f0d3f50d2c632a944b2c0d1d100b5ab50ccb76460532864fc9d4
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 0.9971

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/406889139/free-coins-on-coin-master-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/free-coins-on-coin-master-game-hack PDF link annotation
    • https://donrazvitie.ru/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-daily-free-cards_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
stream_003_off00004a2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2F 25560 bytes
SHA-256: 0cebc0c70380238f34f544167451556bfbcc6b2ecb0c6d559abd67934adcb14c
font_01_sfnt_off000084f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F2 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546

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