Malicious PDF — malware analysis report

Static analysis result for SHA-256 46104d9da259d735…

MALICIOUS

PDF

45.2 KB Created: 2021-05-12 10:45:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8aa658221da33177ba88076cfb9f060a SHA-1: 49e860d63a2f06815eccd7bd06eea55d8e010b9b SHA-256: 46104d9da259d7355ed5cf4af551ef4facda53fe464e49a2297e89a8374d6b93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "free generators" and "game hacks" for popular games. The primary redirector URL identified is https://netcdn.xyz/app/406889139/coin-master-facebook-free-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-facebook-free-spins-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B57 24828 bytes
SHA-256: a22395020326095aebd13fdee5fc3dd97e1fe8cc3e871138f2f41a4f2405cc4c
font_01_sfnt_off0000843a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 18212 bytes
SHA-256: 79ee12bc65f558d17d18def7b629625fa8f5f9a2516006f928dbcf1d2ff3cc16

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