Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1bb5e65e87e2b6…

MALICIOUS

PDF

45.4 KB Created: 2021-05-11 13:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2a7de6b10df563e817dc2ca86acd595 SHA-1: 3a8223bf1dc962a686292d6f56b481ed26c5e20a SHA-256: cf1bb5e65e87e2b6949f771413c024fc0c9921e7db274235fc2e9e1e77507a31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body text and heuristic firings indicate a lure related to 'free Robux' or game hacks, designed to trick users into clicking the malicious link. The primary link, 'https://netcdn.xyz/app/431946152/how-to-get-infinite-robux-game-hack', is likely the entry point for a scam or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9518

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/how-to-get-infinite-robux-game-hack In PDF document text
    • https://invertsports.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://invertsports.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://invertsports.com/images/coin-master-support_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://invertsports.com/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://invertsports.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://invertsports.com/images/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://invertsports.com/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://invertsports.com/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://invertsports.com/images/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://invertsports.com/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44F7 28356 bytes
SHA-256: de677c0f22ee57ea5eb294806cede2164f06da827d89f5a983c894427218bef7
font_01_sfnt_off00008474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8474 3084 bytes
SHA-256: 4889dc98a6bfd3c9244583f92387be58625a91e7a969778ad35ada89b27ed636
font_02_sfnt_off00008f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F19 18236 bytes
SHA-256: 8217e2720e15cc92b3bb050ea8e30655d207dd8077634fd20a14500b8eab7772

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