Malicious PDF — malware analysis report

Static analysis result for SHA-256 68497ecf5ad5193d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 15:48:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fbc7e5781ea892f5c37bac6e3dc4cd0f SHA-1: d84c7a371ca28f4f21b977cea358a94edae991ac SHA-256: 68497ecf5ad5193d754d115fb53ffbbb6456b506529c454b4914cf6d62babce6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious redirection.

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/406889139/free-coin-master-coins-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-ios-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-vehicle-simulater-hacks_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-vpns-for-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/cheat-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-unlimited-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
font_00_sfnt_off00003246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3246 22820 bytes
SHA-256: ebc3afe25775c5db9eec8889e3885d2293c397eec8d7b064fd6e8d263698c85f
font_01_sfnt_off00006581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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