Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfcc07aecb35059…

MALICIOUS

PDF

46.5 KB Created: 2021-06-02 18:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f47883990fe96c35bae556f6cde23ff1 SHA-1: 5a0d6eb875463b9ba938efbf827cc3115fd3f476 SHA-256: 4dfcc07aecb35059b07ee74763a5a48180be3ce6d25893d956bfbd239b069d20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure and websites offering game hacks and free currency, as indicated by the 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The ML classifier also flagged the document as malicious. The document body, though heavily obfuscated, contains references to 'Roblox Skywars Hack' and URLs consistent with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-skywars-hack-game-hack In PDF document text
    • http://schmittmusic.de/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://schmittmusic.de/images/is-minecraft-free-on-xbox_GM479516143.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
stream_004_off000051c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C9 27964 bytes
SHA-256: e458aea5ceb8234a325ad77bc0a127cc08c31dd50efa7cb11bac932137f998c1
font_01_sfnt_off00009245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9245 18528 bytes
SHA-256: 355616d0e5121cb439e34c8e8faf224614bf0d031e9e3f473de434f948d3b6c2

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