Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fefca967241070…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 05:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac67cd7d1b690dd1fca547652cea97c0 SHA-1: b59b045bc719ea68a3a346a1c7fe5c5da7391f31 SHA-256: d5fefca96724107029a53474b55840d8da15864de611770fed41f9cfb6722df3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.online/app/406889139/blogger-coin-master-free-spins-game-hack`. The document's content and embedded links are designed to lure users into clicking these URLs, likely leading to further malicious content or downloads. The presence of a malicious redirector and the nature of the lures suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/blogger-coin-master-free-spins-game-hack In PDF document text
    • https://www.nara.org.uk/uploads/files/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/hack-injector-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/tiktok-free-pictures_GM835599320.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-jailbreak-auto-arrest-hack_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-coins-and-spins_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_004_off000051b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B2 25792 bytes
SHA-256: 4bbc0d5896097eea9530a741aa17d3868075467ead1285f5a74008ce8267a802
font_01_sfnt_off00008bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 18464 bytes
SHA-256: 0911799b9aa5b6ecf8f75e1ae71094da345a4ed5579c86b7800e8f9c3f9f610d

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