Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4aeb46962d86c4…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 11:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01c14a2b2668a9d9374130bd87449b8b SHA-1: b5ad4af5c073daf8c1060a5b9bd7ca6a0d4f7a76 SHA-256: 4a4aeb46962d86c4cf53c12eccaaab2afaa22a739d417a8283e2380667d95cd8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using game-related terms like 'Roblox' and 'Robux' to entice users. It contains multiple links to redirectors and other malicious PDFs hosted on nationshield.ae, indicating a campaign to distribute further malware or phishing content. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection behavior.

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.co/app/431946152/roblox-how-to-get-free-robux-2021-game-hack In PDF document text
    • http://nationshield.ae/userfiles/files/free-tiktok-followers-trial_GM835599320.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-vip-server-roblox-any-game_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-for-roblox-jailbreak-downloads_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-hack-on-arsenal-roblox_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-promo-codes-free-robux_GM431946152.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_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 21940 bytes
SHA-256: 1b9929e658830bb4f4df41bdd406063a441643f12f927a3a35b47e06525ef34d
font_01_sfnt_off0000601f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 19460 bytes
SHA-256: 93e4ea02cfd8b490d4ae0c4bb507294e5508d11bd90c8ec63d9a38cdd5a6c21e

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