Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba48665c1b60fc1…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 04:25:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e4ea445b243a38c9d6d1fd4164fdaba3 SHA-1: 2ce0a42ec20e1db5fa4d3389e47e5ee40501c227 SHA-256: 4ba48665c1b60fc1b0fd18ba48c2f038e7a43b348505141b58be10b47551749b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically `https://netcdn.online/app/431946152/how-to-get-free-robux-2021-game-hack`, which is presented as a 'free generator / game hack'. This indicates a lure to trick users into visiting a site that likely hosts a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/how-to-get-free-robux-2021-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-robux-google-chrome_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/pokemon-go-free-7k-eggs_GM1094591345.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-account_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_off00005060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5060 26024 bytes
SHA-256: 97c12a410bf3312bf3d477d59b4c819624830e3ee42ac69a0c34fb0524136b29
font_01_sfnt_off00008ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD0 18684 bytes
SHA-256: 662354714a7c4aa127b8bd681013e9d5d113fbfc5a2f5afb2d34764175bb04a5