Malicious PDF — malware analysis report

Static analysis result for SHA-256 0451be1e8d7c2f2a…

MALICIOUS

PDF

44.6 KB Created: 2021-05-15 00:30:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0d8b2f1d66883304be4fef25f942ae7d SHA-1: 0ee6d6e59192ff57b0678e97ef6bd7e9be6e7297 SHA-256: 0451be1e8d7c2f2ae06002e980335ad74244c88fbb62c81d75637ebe375f5100
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-games-to-play-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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 https://netcdn.xyz/app/431946152/roblox-games-to-play-for-free-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/www-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-free-download-linux_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_003_off00004b1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1C 28396 bytes
SHA-256: 55d7afc88351580085a80c17a655462c9658fa05ff9e101b472dccb0b69ab0d2
font_01_sfnt_off00008ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 18768 bytes
SHA-256: ab23d1b79a91ba718332cf6cb35a2d4f002a60c6040c891a5ecca9d58b4dd5b1

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