Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdc081e17e1f1d4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 15:47:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 848c74a3352031f996ecd6cd10f45874 SHA-1: 91c0227b92056a61854d4ff636683ae97ea1b6d6 SHA-256: ecdc081e17e1f1d40e1304d197d1b3503e88b77d585f81b8cbe2e0e1857bde66
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. These links, particularly http://netcdn.co/app/431946152/how-to-get-free-robux-not-scam-game-hack, are flagged as malicious redirectors. The document's content and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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/how-to-get-free-robux-not-scam-game-hack In PDF document text
    • https://www.gornjastubica.hr/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-hiring-scripters-roblox_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/como-hackear-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-can-you-hack-get-coins-in-roblox-knife-capsuls_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/gift-cards-free-roblox-march-2021_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-free-robux-really-fast_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-hacks-on-lumber-tycoon-robux_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_off00003142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3142 22716 bytes
SHA-256: d697577e6c5095c26cd8ed04076822f8abc7bbed6b38b62c187051cfb2262573
font_01_sfnt_off0000640d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 19244 bytes
SHA-256: 72e91211a3affe247d9388c26a58db3f395dad290ce4c146b29def1d5505ffab

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