Malicious PDF — malware analysis report

Static analysis result for SHA-256 3381a00afff09534…

MALICIOUS

PDF

41.3 KB Created: 2021-05-20 05:15:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 613c4cd0434ecab8487a3f32ae140583 SHA-1: 1b429702efc75a57dc6a346162588e90f6391697 SHA-256: 3381a00afff095346b3782a5dea961856bf1fd3498b24a86fd600d438e2f630f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free in-game items for popular games like Coin Master and Roblox. It contains multiple embedded links pointing to malicious redirectors, such as 'https://netcdn.xyz/app/406889139/free-rare-cards-for-coin-master-game-hack', which likely serve as a gateway to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially harmful domains reinforces this assessment.

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/406889139/free-rare-cards-for-coin-master-game-hack In PDF document text
    • http://uo-nn.ru/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/tiktok-free-zoom_GM835599320.pdfIn PDF document text
    • http://uo-nn.ru/images/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/tiktok-free-view-iphone-survey_GM835599320.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-hack-iosgods_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_off00004627.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4627 25124 bytes
SHA-256: 7ec88783a530813c3e774f67e1c5c5971362cbbb84de780d0fced8d64bb330ec
font_01_sfnt_off00008034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8034 17884 bytes
SHA-256: 72bc5d58da770c2149c559f5d73934d75c8143dd95bdae4c715961079ab32705

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