Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff58278cb95cdf3…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 19:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8018b92b447dfa57a60eccf82ee700a9 SHA-1: 294a22c799c0a2320863448fd970523a63ff9ee9 SHA-256: 2ff58278cb95cdf37e537e6af0fa205fc37477dbe42e8a6f028ee40644b14db2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically targeting users interested in game hacks and free items for games like Roblox. The primary IOC is a URL that leads to known malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful content.

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/border-games-with-free-groups-roblox-game-hack In PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-dayz-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-for-computer-nly_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-tiktok-coins-for-free_GM835599320.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/how-to-get-free-robux-without-verification_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_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 22272 bytes
SHA-256: 93a6783d406da2c986aadef7f41b5f0b2ec3d6d292d3f19dbdcfc29f18c7dc9b
font_01_sfnt_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 19988 bytes
SHA-256: cb91d45445a9a182106606f8b7a53a9e1acd77671e0bdd38bf500a1fdac8292e

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