Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e57c91af7fcc80…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 09:31:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6261edc956834eb149cc4442092b2483 SHA-1: 787ff253758a17ced3ffdb88a36e68abe9c24aa2 SHA-256: 33e57c91af7fcc80cb3e27dcdf3e1e4754ef17e03a5b61cfc9312ee2801765cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game items or hacks. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a lure for game-related scams. The embedded URLs are the primary indicators of malicious activity, likely leading to further malware downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-no-verification-or-survey-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-2021-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_off00004911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4911 24272 bytes
SHA-256: d9683741331e5047e3b7299630b2823542bf58dc473ae72cce6b08b049b5d216
font_01_sfnt_off00008023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 18892 bytes
SHA-256: 85e8471d4bb7809b16494b43ecc998cec7f87bafeaec38a3001510264e72f0e6

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