Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8db5338a53d7112…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 06:36:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f0afa339463ac0fac4bf195e5f50bb9 SHA-1: 0bc63e2741711857e5546c876054688022321b72 SHA-256: b8db5338a53d71129086ff27f04b82f92364ca986db7f750c3540e54058b8155
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document employs a common lure by impersonating eBay and promising game hacks to trick users into clicking malicious links. The primary link, 'https://netcdn.online/app/431946152/how-to-hack-someones-roblox-account-game-hack', is designed to exploit user interest in free game-related content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/how-to-hack-someones-roblox-account-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.online/app/431946152/how-to-hack-someones-roblox-account-game-hack PDF link annotation
    • http://library.imz.or.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/blogspot-coin-master-spins_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_004_off000051b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B9 28844 bytes
SHA-256: 1a031798d43d249ac0111f2e60dc71bbdebf5669088832dcf4abf25329fd8458
font_01_sfnt_off00008f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F16 18852 bytes
SHA-256: 030760a2b9f78489f4f2527f4aa1c5c01c299c9e8e159a1c649dae053cbb598d

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