Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c441de0683c04f9…

MALICIOUS

PDF

41.0 KB Created: 2021-05-14 03:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5e694c45842c198ad0e508a8c5cb65b2 SHA-1: f04cf29bdac3790a5db3ef347746f0299cfa7357 SHA-256: 9c441de0683c04f90e40db1955f2febc36752fa2ac256917ba1de512cd9b81d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to malicious infrastructure, specifically the URL https://netcdn.xyz/app/406889139/coin-master-free-spins-without-human-verification-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/coin-master-free-spins-without-human-verification-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-download-pc-free_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_off00004793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4793 23844 bytes
SHA-256: a78630180577ad0610b1bb7894222bf04e2f3ba8aaecc8b8018e39bcaa263bb1
font_01_sfnt_off00007c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C98 18784 bytes
SHA-256: 3da53c4bcca0cb9d244bcc93ce65d6bea763e6ea7e90cffc4ca77df440db5a96

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