Malicious PDF — malware analysis report

Static analysis result for SHA-256 0468fdc04cf3e807…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 00:31:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 39c7fd542fb6bd2c1260a2fa90aa6eec SHA-1: c4e262043da29ee73fd5b6ebae1f4311e95342c6 SHA-256: 0468fdc04cf3e807ce34d916aa7b8a67ee33d7243b8da462d27f22461385d12f
122 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, impersonating Microsoft. It links to a suspicious URL, netcdn.xyz, which is likely a redirector to malicious content. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent. The document's structure and embedded links suggest it is designed to trick users into visiting a compromised site, potentially leading to credential theft or further malware delivery.

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/431946152/free-robux-for-kids-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/free-robux-for-kids-game-hack PDF link annotation
    • http://repository.poliven.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-spin-link-coin-master-today_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
font_00_sfnt_off00004b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B88 24924 bytes
SHA-256: 3d05213bfeb33f7693407e596640749c88df88061e28bfdb02f11c88e8efb923
font_01_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 18308 bytes
SHA-256: 763c1f2cd60606b291f89f2a80f52d083a3bf80be883c0f2186ef0e0ffb8dff5

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