Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ed6b84e35618b5…

MALICIOUS

PDF

35.4 KB Created: 2021-06-18 15:51:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eec9df7b938bec71ec229fa9d7b41388 SHA-1: 92bf7dd3f731aa62923593bf30acf0541b9f84c0 SHA-256: 75ed6b84e35618b5ab378b2c52ebea32db3841808c18cd65cb862c668505af8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a generator for free in-game currency or hacks. The document body and heuristic firings confirm the intent to lure users to this malicious infrastructure, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-for-taylorkittylover1-game-hack In PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-spins-2021_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_off00003153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3153 22624 bytes
SHA-256: a218362782dd8b5fde8d6eea63a6d1bd56705d280383e845d2779f8f26984d3d
font_01_sfnt_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 19584 bytes
SHA-256: 50e66fc7b5debd6ae3c9fb9dab894e483b38b85ecfbf9a9e573c7de17789d771

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