Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c7da4ee936872d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 20:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae671bfebbeaeeaa7c661cbd2d60790e SHA-1: d3ae2d244e090ace53b8cb337258d77a5a622c1a SHA-256: 97c7da4ee936872d16c03faa7ea2f52db54fff77621f90d9f9541710990f3839
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text that lure users into clicking on a URL promising free game currency or hacks. This URL, http://netcdn.tw/app/431946152/get-free-robux-info-game-hack, is identified as a malicious redirector. The document's content and the presence of redirector links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/get-free-robux-info-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-exploits-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-taks_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/10-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-any-account-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/master-game_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-free-youtube-aspire_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_off00002fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC1 23104 bytes
SHA-256: 79e7d02bf4da1ab47e7e084fc71da3285278d620abe4629c27ea4ff848bb7ace
font_01_sfnt_off00006404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6404 18820 bytes
SHA-256: 8535eaa3a36812cf4d83c53ed5505d1914af83630ad42aec0f482fa3bbee313b

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