Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec6bbe8913ab4dd…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 00:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5112f34f4923a1ae7a47a3a9f9ceab50 SHA-1: 2151a2f280280e755b482170557016fb599d58ed SHA-256: dec6bbe8913ab4dd1fdddac388a426466085be9056e4c6db460168da5e795ab4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising game hacks and free currency for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirector links and a lure for downloads. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites.

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/i-got-hacked-in-weird-writing-roblox-game-hack In PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-bubble-gum-sim-hack_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-be-an-oreo-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/ben-10-universal-showdown-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-hunger-games-hack_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/one-piece-roblox-hack_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/all-client-roblox-hack_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
font_00_sfnt_off00002edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDC 22356 bytes
SHA-256: b9c3bb397f58a0918f914822912b65d831e7efe7cfa890aeee515eff1285d71c
font_01_sfnt_off00006091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 19252 bytes
SHA-256: ec1048eb227d8a8bd2709011f6977901ef1463b435b4ccf329cd354175cd88c4

Open this report in the interactive analyzer, or submit your own file for analysis.