Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ccfa38f51c71fe…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 14:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d9822b4af394c07ac6c38be3257f9e0 SHA-1: a3907552e6a53a9dce2d38322bf43487ffe1f242 SHA-256: f3ccfa38f51c71fe0c187787b3407ea09f689e993bcb7da251df18fd6ae75c8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains embedded links that point to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/roblox-robux-cheat-engine-2021-game-hack. The document body and heuristics confirm the intent is to redirect users to potentially harmful content, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-robux-cheat-engine-2021-game-hack In PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-blob-simulator-hacks_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-with-no-downloads_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/buy-free-hacks-now-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-hack-script_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-get-free-robux-2021-not-clickbait_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-hack-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/code-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hacks-roblox_GM431946152.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_off00003026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3026 22224 bytes
SHA-256: 04ce147c964f558d3477c3a7d6fcebca06f722d93e2c822b1e483c7b71fb8f51
font_01_sfnt_off000061b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 19420 bytes
SHA-256: 3ce13c2b8ee7c8badd7172d80e6f617b86b9dcbbc1f69f86cc5534dd88ddb16f

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