Malicious PDF — malware analysis report

Static analysis result for SHA-256 630f821417bd9757…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 06:23:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d8a92f32eea5ef6bbd3fb57ed9c958f SHA-1: d32ef0dddfa1b9b4734afd23aac8f471cb2e997e SHA-256: 630f821417bd9757580ae50a8ae8b86254f925bc1edc738eedfbcc24b82ff252
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-eu5-net-game-hack. This lure, combined with the 'free generator / game hack' theme, strongly suggests a phishing or scam attempt designed to lead users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-robux-eu5-net-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-asset-download-for-t-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-god-mode-hack-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pubg-500-uc-price_GM1330123889.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-million-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-use-undetected-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-synapse-x-free-key_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coinmaster_GM406889139.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_off00003208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3208 22856 bytes
SHA-256: cfdaf1ab9eb8371a15cd6a9f4e165f713ebab722ee4a694bff3a6f9a31b8b577
font_01_sfnt_off00006532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 18956 bytes
SHA-256: 2dec5ab0f74aec605a79090829cbf4eba2d0e822a633174507b9da45192fd809