Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e78a84e0eaf8f0…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 00:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 756381a049e4d899747a891549de9b02 SHA-1: ad22a400718f0a23b502c77f8d0b88df9be0d3d0 SHA-256: 62e78a84e0eaf8f0c4a2e7b340aed226458529b0a575a27e55930def985df942
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/make-free-robux-game-hack. This pattern suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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/make-free-robux-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/r67-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-weight-lifting-simulator-2-strength-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6D 21680 bytes
SHA-256: 15f4715966aab6c3688ea47eb97bbbcb4d33124e09c7f08b6c9b0d07496b600c
font_01_sfnt_off00005e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 19084 bytes
SHA-256: 480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675

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