Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fd50151fb286a9…

MALICIOUS

PDF

38.2 KB Created: 2021-07-06 06:59:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f6ba4cf1db0550e1db07780e17fc9714 SHA-1: ba7b66dd123161d122ac8838771c6f5f41efe7d0 SHA-256: 50fd50151fb286a9e8d12582acda2842ec91513e097e75fb8aece5b1fbed38c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-hacked-version-game-hack. While no scripts were directly extracted, the PDF structure and heuristics indicate a lure designed to drive users to potentially malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/roblox-hacked-version-game-hack In PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/how-to-hack-ban-roblox_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-jailbreak-hack-mod-menu_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-roblox-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/fog-removed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-promocodes-working-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-hack-highter-rank-in-group_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-roblox-sex-game-glory-hole_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-bux-roblox_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_off00003d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D4A 22880 bytes
SHA-256: 63817bfa240454eb93d6bf49b0c08b6c0a562ebc554878b44b73bdb0d5153aa6
font_01_sfnt_off00007083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7083 19084 bytes
SHA-256: e30baab197ea380a830251f11993b0159206347d5302a55b978f6309ced101e7

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