Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c25ec0e269113d4…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 08:06:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 878115770565c464dbc82357f63b6e16 SHA-1: 7056b9d7879bfff55f73097adf1d27c1cfa20c69 SHA-256: 4c25ec0e269113d40eafbfad6dff8433beb9f64c23da4134ce7aa863e4f6e618
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 0.9748

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/479516143/free-minecraft-java-edition-codes-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-pocket-edition-free_GM479516143.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_004_off000052a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A3 24440 bytes
SHA-256: 9c0ce190a62bd77f0e8a9f20e8f64998ed28c63d451e09e73d5cd1cf5042ec60
font_01_sfnt_off00008a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A26 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off000093c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C4 18164 bytes
SHA-256: 763f9cfe2ad76014aae7cafc6f7611f20a26af8eb80c124d2b15476bdad829f1

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