Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f14da9bdc34e42…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 05:49:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb8017f7c093180a9e5def4dd31f207b SHA-1: df5749d8edf1f93bfc05daefe0111a35567a814e SHA-256: d8f14da9bdc34e42e58c638fd96882afc32584812b7576f8bde30a6025645fda
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 0.9871

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/how-to-download-minecraft-hacks-game-hack PDF link annotation
    • https://gastronomytours.gr/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://gastronomytours.gr/ckfinder/userfiles/files/apps-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_off0000519e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519E 33908 bytes
SHA-256: 84334c291ae3de770cb24d94707536a2fb430d85b518233948f275f1f14b40b0
font_01_sfnt_off000098a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A9 18460 bytes
SHA-256: 201e47ea1bc759f6ab60629fe707baeeae03fa46224cbd2752ecc215bd4960d2

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