Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4dcda065319e4b0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 07:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c306cf5b672a9f5650272390df20e61d SHA-1: af2c1561043df2feef8545e12f838317b2635b29 SHA-256: d4dcda065319e4b0602df3ae6266fe25c4d6ffc1f70723ff87fe1bbbb684e9d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure and potentially malicious domains, disguised as game-related content like 'free generator' or 'game hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure further supports a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to lead the user to external malicious content.

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 http://netcdn.tw/app/479516143/minecraft-pe-free-game-hack In PDF document text
    • http://nationshield.ae/userfiles/files/dbz-galaxy-burst-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/easy-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/login-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-roblox-card-reedem-cod_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/animation-roblox-free_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-daily-spin-free_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
font_00_sfnt_off00003328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3328 22492 bytes
SHA-256: 90822d9abfe7ae4eca5b1b8c76a6b310f62c5a0630d41694276e5142adce29a7
font_01_sfnt_off000064b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 18008 bytes
SHA-256: 7b53852c349be1bc084196235092269a717ad06b6af355bc11c1fdb457e3227a

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