Malicious PDF — malware analysis report

Static analysis result for SHA-256 6940e41ef7d56ebb…

MALICIOUS

PDF

44.4 KB Created: 2021-05-19 01:10:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 39a659ce4c10a663a26649a42acec349 SHA-1: d03d109997c07a5c3d5ebe37990f854151e49314 SHA-256: 6940e41ef7d56ebb4849a3c8ea5af0c93cca09c8ffd46c3680f5eff996bbf226
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 0.9632

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-spin-blogspot-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D7 24608 bytes
SHA-256: c1931e3c97a09aecbafb86515f00d6989b0a13d46617ff1bf8f95d2bc20ca056
font_01_sfnt_off000080f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADF 18300 bytes
SHA-256: da6108506d645fcbe3414e0c69cdcf67670a59a1c8ef58446631e8e12bd9067e

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