Malicious PDF — malware analysis report

Static analysis result for SHA-256 676cc735ac4774fd…

MALICIOUS

PDF

42.4 KB Created: 2021-05-10 23:43:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a1c90759f5ae8617cb532a1cfe1fbff SHA-1: 89952b1be8cdd1dc2f6560ba9d3053aeecbbcace SHA-256: 676cc735ac4774fd8a2daec7519ce5c81fda601eb2a6c4cbcdb03743e11bf844
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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.
  • 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/coin-master-free-download-pc-game-hack PDF link annotation
    • http://librarysenior.com//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-help-free-robux_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
stream_003_off00004a18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A18 25088 bytes
SHA-256: c0878b45fd8aafb8c44e2c384e9c11ea16ec503b84d9830e6f7f6ef65c26f3df
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 18444 bytes
SHA-256: b0499442804c302970887a2d9cba6ef3f31768e477807758de6572ac3a0df5c2

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