Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d9455dcddad773…

MALICIOUS

PDF

48.5 KB Created: 2021-05-13 06:00:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5ef237aa788164ddeea0a47bb2969274 SHA-1: e3bec0ac57a937c418539735edb77bee98836ada SHA-256: c4d9455dcddad773a89c6fbb4d7acbf4f56ac93430175fe7fa2497017271e726
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free in-game currency. The ML classifier and heuristic firings strongly indicate malicious intent, likely to direct users to a site that may host further malware or phishing content. No scripts were extracted, but the presence of numerous malicious URLs and the 'game hack' lure are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/free-daily-spins-from-coin-master-game-hack PDF link annotation
    • http://kontaktadig.se/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/download-coin-master-free-spins-link-2021-today_GM406889139.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_003_off00004caa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAA 25672 bytes
SHA-256: 0e6587e48a1930b271137fae95187ecc4a9c6d1264890dd0452a2f929b78bd7b
font_01_sfnt_off00008853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8853 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 18568 bytes
SHA-256: 83a1403c7ea81f16df60b15bd3ed63af058033cc9f39ccf30f75695a9a8bc87e

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