Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc4374f702517fc…

MALICIOUS

PDF

34.0 KB Created: 2021-06-26 17:22:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25fbb54ef83c21839b0cca766d9e0038 SHA-1: 1b8b70622f551bb68d6205e9abe27c74ac71a10d SHA-256: bdc4374f702517fc0a8b203140b9f5493550156616af899586b62684319e5e35
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/dll-for-roblox-hack-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to download and execute a second-stage payload, likely through a drive-by download or a user-initiated download after being redirected.

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.co/app/431946152/dll-for-roblox-hack-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-link-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-templates-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-roblox-accounts-2021_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_off00002da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA1 22512 bytes
SHA-256: f9a38eb8eeaa5fe2c252c1882072ee64738747dc9e6ce49d4d524669a57b130c
font_01_sfnt_off00006004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 18988 bytes
SHA-256: 7e890ba517473a22e87865cc3c928b8d86757733b231a2b136536aa8ac8d813e

Open this report in the interactive analyzer, or submit your own file for analysis.