Malicious PDF — malware analysis report

Static analysis result for SHA-256 0beeccacdcefb16a…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 06:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d4f32b82d74ca3b6b36c58dcd3f8a3d7 SHA-1: 36feb83965361a9eefc0105be28513f2a93ea0c3 SHA-256: 0beeccacdcefb16ab5b9ee67697a2afbbbb21f49bfe2eca0433e0740c8d6f346
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary lure URL is https://netcdn.online/app/431946152/free-robux-without-doing-anything-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to entice users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-robux-without-doing-anything-game-hack In PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/krnl-download_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/i-want-to-grow-my-account-tiktok-free_GM835599320.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://www.romento.com/uploaded_files/userfiles/files/free-minecraft-windows-10-account_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_off00005184.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5184 25004 bytes
SHA-256: 39459b4ecb4dd761db97f0a55354c488c8d0c2ffda11665bf119425c02cfc4ac
font_01_sfnt_off00008b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 19240 bytes
SHA-256: e1e4d521198b5ef2bb2d2ba3e061f6fd747e7988b39df69dcb6ecbaf810b6a5c

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