Malicious PDF — malware analysis report

Static analysis result for SHA-256 36cd4b63fb7c7290…

MALICIOUS

PDF

41.3 KB Created: 2021-05-15 10:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a8958945c19e41f606770989b3c313b6 SHA-1: 235ee259deaa2607464b0a45dc389bb41c210c90 SHA-256: 36cd4b63fb7c7290cbaad4e68c7da248862d3614d8e16539573eaa3b99efaeb1
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/coin-master-free-spins-link-today-game-hack PDF link annotation
    • http://solidkom.ch/images/hack-client_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://solidkom.ch/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/freecoins_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/get-me-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_003_off0000469c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x469C 24816 bytes
SHA-256: 365c31c7e9d6124c6733d1b6d9daf60e909f923d28845d430d0799b1ba400d32
font_01_sfnt_off00007e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 18412 bytes
SHA-256: ee277532c3187caf3da016130e4cbd3fee848ac0b1174d0f40fc16c12ed3c41d

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