Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3f6099470da0dd…

MALICIOUS

PDF

41.4 KB Created: 2021-05-11 05:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 51c30ec323960798752fd3cde472d956 SHA-1: 4312ffc6d091f47419969a991ed54c4cddb40fd4 SHA-256: fc3f6099470da0dd9981247229fdb50b052f88e0a6832d5996b7eb283fe576fc
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/instagram-free-coin-master-spins-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-no-human-verification_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_off00004883.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4883 24456 bytes
SHA-256: 54f8cd496f3f37a5f25049858662d0e5cdb4dfa420fbcabdd2dc5d7f5ca21a0f
font_01_sfnt_off00007efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFC 18432 bytes
SHA-256: 3b7c13828b5d2698888b27dc686b1c319bce69ca64f14fa9be164a5a94bcd277

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