Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7b6facdf7c8f2b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 15:20:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0129b179a16a5ea2d6166dd77b9528f6 SHA-1: 8d3ad0d6d4007afab571d6202eb5678c8c7099df SHA-256: 7d7b6facdf7c8f2bf40b58f00d01cfad3d209d9c2364877380a781f7f7a74b8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, promising free Robux and game hacks to entice users. It contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/robux-earning-websites-game-hack, which likely serves as a gateway to further malicious content or downloads. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure tactics.

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/robux-earning-websites-game-hack In PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-computer-generator_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/can-i-have-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-asriel-hack_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-seraph-free_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/aux-s-roblox-hack-pack-v2zip_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-jailbreak-noclip-hack-feb-2021_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-hack-roblox-with-inspect-element-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_off00002eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECA 21776 bytes
SHA-256: fa1f5ea3c8443b1076ca0a5507979e007bec6cc044d34fb60678027db9cb1252
font_01_sfnt_off00005ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 18976 bytes
SHA-256: c40708dd9bc9f9da8d82c70e8c8e3b96b80ee502ff2c69e470291093ca3e5ce3

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