Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3f3a73fb14da0b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 23:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: e1816ffefaef204afdd24aaf5db1c342 SHA-1: 6e25d0abaf56929ce9a345a93be63d6c8563aec3 SHA-256: 4e3f3a73fb14da0b6747300b6f4d9551fd8cdfefe01c8e983835b92fe3ed3002
240 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/oprewards-free-robux-game-hack In PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-android_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-coin-master-hack-no-verification_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_003_off000047b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B4 26232 bytes
SHA-256: 967e968b6e44bfb47c4c659a5cfd6f78161e83a746ee22d711fe35181aedae10
font_01_sfnt_off000083da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DA 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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