Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b86d92337312d05…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 20:14:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a08aa7283e9b32cd635b4f6c8e62158e SHA-1: 1e369b1e0c766795bb082e93633bc745a2a640ee SHA-256: 5b86d92337312d05e446fca562bd2ec5d763b015a13035f69a3c90ee59d9c1fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a URL pointing to a resource that promises free in-game items, suggesting a phishing or scam attempt. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into clicking a link and downloading a potentially malicious file. The ML classifier also flagged this PDF as malicious.

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.tw/app/431946152/how-to-get-wings-for-free-in-roblox-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/no-human-verification-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.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
stream_004_off000050b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B0 26132 bytes
SHA-256: d3ece72bac52b77c995a36b9a77657eda4b7a61b02a28fe843080c3249a9ffe6
font_01_sfnt_off00008b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B43 18824 bytes
SHA-256: 284f1fc6fdc036725aecefe788a46f671c17131b6e1bab53257c220bfab8db60

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