Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6534675aad688e…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 23:17:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae5dbc71761494d40112e0e11f10be17 SHA-1: cfcb2f8c46b0134d1c61819f6a6e91073097cc3a SHA-256: ca6534675aad688efbbf555b687cf1688582181a997d2a77e3781e146d7c1b5c
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, often disguised as game hack generators or free currency sites. The document body explicitly mentions 'Free Robux Codes No Verification 2021' and includes numerous links to similar lure content, indicating a phishing or scam attempt. The primary function appears to be redirecting the user to potentially malicious websites.

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.tw/app/431946152/free-robux-codes-no-verification-2021-game-hack In PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/tiktok-free-music_GM835599320.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/comment-cheat-les-robux_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-script-speed-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/take-a-quize-for-free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-jailbreak-geld-hack_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/africa-but-its-copyright-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/hack-all-computers-roblox_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-cheat-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/descargar-menu-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/free-roblox-studio-ios_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-jailbreak-hack-script-2021_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_off0000307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307F 22384 bytes
SHA-256: c5c5ece34096f001df604a97b337a6a4d441b6c6bcd25bc4983cf613e493033a
font_01_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 19648 bytes
SHA-256: c9b5e446bd4f49308c598e64be383601662d64f1913011d813836102a9eea03a