Malicious PDF — malware analysis report

Static analysis result for SHA-256 04671385c089384e…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 01:15:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4194298b288e2245d6888096dd249d8a SHA-1: 4cfaa50c84f5ee157b80913a9a62e529e6b97b9e SHA-256: 04671385c089384eee522e99131c382416e8e8388a3a34f776d52cda721aad91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-anti-bot-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for further malware delivery or phishing. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-anti-bot-verification-game-hack In PDF document text
    • http://www.notaioricci.it/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-pro-hack_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_off00004900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4900 27152 bytes
SHA-256: 17e7ca224a1a876168262fce005463eb3ced1d255196cee9900891a7eff7197b
font_01_sfnt_off000085cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 18600 bytes
SHA-256: 8cfd8c2479ee29cd4f6dba9b0ab7f96f8a0f4a4bb194f6119df547073888af7b

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