Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20ddd660016bad8…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 23:10:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc565080086be3ce8289a95f9fc60842 SHA-1: 6630ded9f9d2d4ccb8ea25d3ed116b66290e7d7a SHA-256: e20ddd660016bad83f73d14d684c1ab3269fac5a4bdef3ebe620e7f40a52025c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "generators". The primary malicious link identified is https://netcdn.xyz/app/431946152/lots-of-robux-game-hack, which is associated with a lure for free Robux. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scamming attempt, likely leading to further malware download or credential harvesting.

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/lots-of-robux-game-hack In PDF document text
    • http://www.gravel.ru/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/tiktok-free-view-iphone-7-plus_GM835599320.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://www.gravel.ru/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/robux-offers_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/spin-and-coin_GM406889139.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_003_off00004ad1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD1 23968 bytes
SHA-256: 78b2968558ed1f228c77ff4714ea2022c1992e2067fa1875f3e79f075b6f28b9
font_01_sfnt_off0000814e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814E 17952 bytes
SHA-256: 15d841c4e586d0ad4ef984c3fe87cdc5c0f17f998b76c5925d27cfadcec23376

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