Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa591654c6fd9aeb…

MALICIOUS

PDF

46.2 KB Created: 2021-06-04 03:26:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39fe1da501a05f8adb56d00d0c5611a7 SHA-1: 397398e0c554239f42ac1b2e010375a693e505a8 SHA-256: aa591654c6fd9aeb517540019adccb7b36cbae4485205b5f5f02b23f7b04ed98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'free generators' or 'game hacks' for popular games like Roblox and Minecraft. The primary malicious link identified is https://netcdn.online/app/431946152/how-to-get-free-roblox-gift-cards-game-hack, which is flagged as a malicious redirector. The document body, though partially corrupted, contains similar lures and the same primary malicious URL, reinforcing the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-roblox-gift-cards-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/promo-codes-for-free-robux_GM431946152.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_off000051c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C4 27752 bytes
SHA-256: 250b0f10a82a76e46bf4a89719783adf6ae53befc8f29a0857e55c9e9ff5f62b
font_01_sfnt_off000090a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A2 18740 bytes
SHA-256: 4ca4edcee29dbb5ec5fd43b786ee3a040f637d4fa80ece8255e459f77acc63d1

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