Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a8aa1048e93a54…

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 03:16:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a6e56c27901d7a55eb7967e70fa35658 SHA-1: 183d3e8520a4bcca465f8d7deeead6c56ceb1361 SHA-256: 93a8aa1048e93a54ac8c494172dd5c2647b46ff9228d872b81d3027e304cdaa9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded links suggest a workflow designed to lead the user to download or interact with further malicious content, likely a second-stage payload.

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/406889139/freespinandcoin-game-hack In PDF document text
    • https://razredna-nastava.net/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004979.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4979 25884 bytes
SHA-256: 3060a8d1b67b744a826554364fe1c6d77a1971af5d658afc3ecebced596eadce
font_01_sfnt_off0000847d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847D 17956 bytes
SHA-256: 1c693cd3c749c7deb88a93ce437f6f23953c7e7e8560ccdde2498ee9463f8dc4

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