Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbbdf2909b3dd64…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 03:22:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 301e8e29025ec92ba60a43f3520131ef SHA-1: 710d8ade1d19a87d822adaeb0c430f3b54b2bf38 SHA-256: 8fbbdf2909b3dd6486b0da223628dda2e9afb26d893062afcf371aab3ca9b818
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.tw/app/431946152/how-to-get-robux-for-free-2021-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-logo_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-anything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-its-free-music-id_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/add-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-accounts-2021-december_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-catalog-free_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_off00002eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB5 22148 bytes
SHA-256: c949243824bb635a56075ee64283fb77d08742c3e3c60774b5fa9eac8ab80b1e
font_01_sfnt_off00005f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F95 19384 bytes
SHA-256: de28a66561f48ef455a7e74c3d38ef737581a70ecb9f32033b07134a01356d69

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