Malicious PDF — malware analysis report

Static analysis result for SHA-256 e250ed03c73bd51d…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 10:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9fd7b198aed64acb3fc14cceba90acfe SHA-1: c99f7c3e15bdbf67eedb3b0a9655269f13b9e28b SHA-256: e250ed03c73bd51d0dcc9264192fdc88b2b91feac2418ae2691bc29e0cef9041
122 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'free Robux' and game hacks, impersonating brands like Apple to trick users into clicking malicious links. The embedded links redirect to sites that likely host further malicious content or exploits. No scripts were extracted, but the PDF structure and heuristics indicate a phishing or credential harvesting attempt.

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.
  • 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: http://netcdn.co/app/431946152/free-robux-in-obby-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 http://netcdn.co/app/431946152/free-robux-in-obby-game-hack PDF link annotation
    • http://suaedy-library.net/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/pastebin-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-clothes-2021_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_off000036f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36F1 22416 bytes
SHA-256: f55d6e0f8394ccdd2a797ace5af8da7e4603f48f2837e67f0223c1015c25e329
font_01_sfnt_off000068d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 18896 bytes
SHA-256: 0232284c44073cf786b0124f8da178d2f8fe1dec1f13881ac5362d37b97903af

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