Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdd583d2bbb15ad…

MALICIOUS

PDF

33.5 KB Created: 2021-07-07 21:24:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b03fb436fbc2ef62b6225f448fc031e7 SHA-1: 8588cf139bd2eb27ca00d30f21b73d2112202121 SHA-256: fcdd583d2bbb15ad7fb4bef5dd05f4b311bd8ded2d699e645e01c47f3693e98e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a 'free generator / game hack' URL. This URL, http://netcdn.tw/app/431946152/get-free-robux-2021-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially malicious websites.

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/get-free-robux-2021-game-hack In PDF document text
    • https://www.gornjastubica.hr/files/hack-roblox-2021-february_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/adidas-roblox-shirt-free-design-high-resoulution_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/cheats-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-how-to-get-free-membership_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-robux-disocrd-servers_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-candy-script-roblox_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/robux-hacks-pc_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-com-free-robux_GM431946152.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
font_00_sfnt_off00002d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3E 21664 bytes
SHA-256: 7c89862c43be3fc972530e44a3620f87a1a8ba6f809759949c1ce9ff73899f4b
font_01_sfnt_off00005cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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