Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd51fbf8e28e6a17…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 09:29:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 03baadaee76b47638e73bf93a2a8bbc3 SHA-1: 398704527a4bda29d15e5a30d4eb9fa0f4ee8fff SHA-256: dd51fbf8e28e6a17cc62917caa60023b6d2994a8a8592e2ce8786f45b51079cd
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 0.9832

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.online/app/431946152/how-to-get-more-robux-for-free-game-hack PDF link annotation
    • https://registrasi-transvision.com/ckfinder/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/make-robux_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/pubg-uc-dealer_GM1330123889.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/coin-master-free-spins-5-10-2021_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_off00005170.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5170 28556 bytes
SHA-256: 0d9bf0eb433257f64549979ec055661f24bdf665c9ec26f08ae79c61382ecdf6
font_01_sfnt_off00009356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9356 18480 bytes
SHA-256: 444f48c68388f928a3d871611d0873030738946ead4f6691d00c6869f71b1127

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