Malicious PDF — malware analysis report

Static analysis result for SHA-256 d212d65b3ffcdd70…

MALICIOUS

PDF

29.8 KB Created: 2021-05-13 19:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 579261df3e896d35845ea8d54013d1ef SHA-1: 1e6419467f8d821efee787b1599abb8d836f9995 SHA-256: d212d65b3ffcdd70f123002693e95bd7e7e665be80867acbeef377aeda5131a0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains URLs consistent with the lure. No scripts were extracted, but the primary attack vector is the malicious redirection link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • 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.xyz/app/431946152/get-free-robux-com-game-hack In PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF6 16698 bytes
SHA-256: aad919480e975e47fc6803497f3d4c23758e34222d47bd6fbb201ca8e33ea7be

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