Malicious PDF — malware analysis report

Static analysis result for SHA-256 8562eb1449c841c8…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 06:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9bc5c83223a27034ca84cb9e14d0e8e SHA-1: d7d74030fe5454ab99742232ad8364ff443a00f1 SHA-256: 8562eb1449c841c87efedcc6f723542cc56b600d641ac6c4cc398034a692fd64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that attempts to lure the user with the promise of free Robux. The primary URL, https://netcdn.online/app/431946152/free-robux-gen-website-game-hack, is likely a malicious landing page or download source. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-gen-website-game-hack In PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/robux-builders-club-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalmanar.com/__statics/gudangsoal/files/coin-master-daily-free-cards_GM406889139.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_off00005482.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5482 25708 bytes
SHA-256: 15faf03800bb6a721492b7875e1a8e21a9c9613b36b9e5a43eec46a299463b58
font_01_sfnt_off00009099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9099 18436 bytes
SHA-256: c320c2753926bc00ba209e6cfd491b8927cd55e479046100d49c538dc347586b

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