Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d1c95750c99ffe…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 22:45:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0cee8d1460bfbc32b3bdbec1f5b0d2e3 SHA-1: eb8e4e8b92599e722e468a43ad9795fc65599e1d SHA-256: a8d1c95750c99ffec549d01e5e58a38057d2fd30d269e4fde04979ef8b90d061
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of malicious redirector links and the document's theme strongly suggest a phishing or social engineering attack.

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-2021-2-4-game-hack In PDF document text
    • http://library.atim.ac.id/repository/real-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/speed-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-denunciar-a-un-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-2021-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-userscripts_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robloxcom-free-dominus_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-bis_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-infinite-robux-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/god-mode-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-free-apk_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
font_00_sfnt_off00002fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA0 22292 bytes
SHA-256: 5ecff44ec49556d5c5090843b785bd674f74ef1cd997aee65387fad3773e96c3
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 19448 bytes
SHA-256: 9dc699e886f51a4dfebf09941148cfcc3557c71209db762cdd3f877aa94b54b4

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