Malicious PDF — malware analysis report

Static analysis result for SHA-256 4840bc24ab11d33a…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 13:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c506be157d18d4e8822ee5e84b77d91f SHA-1: d4b6628510b3d9cdcf76629ddbbb693114ea4968 SHA-256: 4840bc24ab11d33afe6e8e71d2674a028adb94ed228d4b2cb0361328a6d91d1f
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 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-dantdm-on-roblox-and-give-robux-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/master-game_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/paginas-para-descargar-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/corn-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/earn-free-robux-rbx-blaster_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-promo-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-week-for-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-group-giver-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-co_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
font_00_sfnt_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 22076 bytes
SHA-256: e881d9264148949ae296c44f1967bf447179c0b0fb9c66b8dc15944c2d8fc03e
font_01_sfnt_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 19900 bytes
SHA-256: e8a89a5c9d1313d78e100c1e7b4756d7ce74836467c1d47dc753e7d834abbf83

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