Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c8bd2fb96a1b98…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 04:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2275209f5553f017cb1131c2528d9667 SHA-1: 19ddd0becc14947924eb27decfabfc3d1ef9a3ef SHA-256: f5c8bd2fb96a1b98e1c09546e292325b25be07fa8625f7e86d1678ed9f66e4d6
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to websites promising game-related cheats or currency, such as "free Robux" or "free spins". The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary link leads to known malicious infrastructure. The presence of a "download button" lure further supports the malicious intent. The document body, though partially corrupted, contains references to these lures and the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/https-roblox-free-robux-web.wordpress-com-game-hack In PDF document text
    • http://unifieo.br/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/roblox-game-private-free_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/i-want-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/tiktok-free-view-github_GM835599320.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-fire-tik-tok-2021_GM835599320.pdfIn PDF document text
    • http://unifieo.br/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D93 22236 bytes
SHA-256: e670938edfb9aaf2cd3646f184991e39e66802eccf343360c26c442b91ce32eb
font_01_sfnt_off00005f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 19744 bytes
SHA-256: 645f55b8fd9efd927b7b000175cb0f0adcd7b45086114a2e4523c9bcbc9b449f

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