Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d177a73b3601cab…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 17:41:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: caaf79ab857a3744da2883efdf57d793 SHA-1: c5538b7af2d99f460ec64f46e23e50ac2c5ba5df SHA-256: 4d177a73b3601cab1f5264fd3aad5460b7ff038ad493b637d3b1fb2421c77717
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'generators' for popular games like Roblox. The primary lure URL is http://netcdn.co/app/431946152/hack-into-a-roblox-studio-game-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

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/hack-into-a-roblox-studio-game-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/games-with-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-para-volar_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-anything-free-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/exploit-engine-roblox-free-no-virus_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-online-games_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/game-freak-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-pretty-face-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-for-chromebook_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F46 22600 bytes
SHA-256: b54164b95a24118fb47ec92f9db7f45ae9d8db288c656d0cd1737e4924144380
font_01_sfnt_off00006192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 19452 bytes
SHA-256: 9a41ebbe01610a78ded7b00cc63978b0f5a5c273cdef5f08559496de713bc816

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