Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff50d841b512657f…

MALICIOUS

PDF

44.5 KB Created: 2021-05-20 00:33:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 884a69b21a3f9a526c69d6f22e2c6b20 SHA-1: 52d03ea0a49cf89efd16fd8b01525e7cda95f2f1 SHA-256: ff50d841b512657ffa1e881fbb58d45d0312a2535303514411ef55f790fac7ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as 'game hacks' or 'free generators' for popular games. The primary lure URL is https://netcdn.xyz/app/431946152/my-roblox-account-was-hacked-game-hack, which is associated with other malicious domains like niarads.com. The document's content and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/my-roblox-account-was-hacked-game-hack In PDF document text
    • http://www.niarads.com/images/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.niarads.com/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://www.niarads.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.niarads.com/images/coin-master-32-mod-hack-apk-download_GM406889139.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
stream_003_off00004677.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4677 23496 bytes
SHA-256: 6d9f80e1d42d4980fc83b8a92fe4b4f19038dacd139b770e803b0b640fe46062
font_01_sfnt_off00007b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B90 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 19176 bytes
SHA-256: ffd13423bb2d32432d99d8a895d46ab03e3902ef9e73634024ba4176c0f3d041

Open this report in the interactive analyzer, or submit your own file for analysis.