Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f4c97e10c38390…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 17:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a0421110f1bb2004fd89f9d97eb12fd8 SHA-1: da0ed249ce59e44465ea00491e5c690833da32bf SHA-256: e4f4c97e10c383902a27e821ef848a36d77aa193d3fdfa3fcbb9c01056b36291
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 multiple embedded links, including a primary malicious redirector at https://netcdn.xyz/app/431946152/freerubux-game-hack, which likely leads to further malicious content or phishing pages. The document's structure and embedded URLs strongly suggest a phishing or scam campaign, likely delivered as a spearphishing attachment.

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/431946152/freerubux-game-hack In PDF document text
    • https://mbbs.hr/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/install-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/hack-client_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/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
font_00_sfnt_off00004787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4787 27496 bytes
SHA-256: 1145e3c4d0c66f607527e14ada5d44782ec22917a37ceb8f6ce4d27bc85c9d33
font_01_sfnt_off0000860a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 17872 bytes
SHA-256: f4416bbc5f287efcbe31c7b4c704cc92a0ced0ddcdd2f5cfb5fb7d41fdf7fc1a

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