Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a4f2fc34fd9aed…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 10:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c17e84aeccfd219ce8d3f52fe2d32bfd SHA-1: 7e15425d25ab11f0ed18c1367c968ca6ecfc2fda SHA-256: 35a4f2fc34fd9aed1430208832ea916cd8562a75e52e467b775d87a311500ac3
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 0.9865

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/free-robux-live-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-to-get-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_004_off0000500c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500C 23952 bytes
SHA-256: a83f5b4c56989cfd0c4056077ce441b1ab9244051e9c30d30772f3f67701efc4
font_01_sfnt_off0000867f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 18248 bytes
SHA-256: 2e5a72f8344bcf9b425e9fd022f0a9c5c2029812f1a4b00ba9f2a8ee504eb572

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