Malicious PDF — malware analysis report

Static analysis result for SHA-256 5190de8ca07d7121…

MALICIOUS

PDF

33.5 KB Created: 2021-06-28 17:08:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47b12140472b229eb4106c8763e1ba23 SHA-1: 8b53220f0f1fa598c7648f1b51912ecfd99b2906 SHA-256: 5190de8ca07d712195cadaa825b10f6d12ae4e4193b3c1f01266598e5e5bc41a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for games like Roblox. The primary lure URL is http://netcdn.co/app/431946152/how-to-ban-people-on-roblox-hack-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-ban-people-on-roblox-hack-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/download-skin-roblox-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-free-eazy_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/boko-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-kohls-admin-house-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-shirt-codes-free-shipping_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-that-realy-works_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-online-unblocked_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/download-coin-master-hack_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
font_00_sfnt_off00002a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A6B 22880 bytes
SHA-256: a2177d2723a097980831a4f7ac491638b8b163cec938f0f633455beffc324c32
font_01_sfnt_off00005dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAE 19148 bytes
SHA-256: fe54d812222b204731aa2f36553741b10a94de765c9d6f9d8d24a5d7d41e03d9