Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec22134e3e4d1e90…

MALICIOUS

PDF

48.3 KB Created: 2021-06-08 23:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cdd926820ef4f1c57dbe7e63535deefe SHA-1: 7308c7f19ebed12122aca80991a4b13c1177a323 SHA-256: ec22134e3e4d1e90464a7ffe21aebdb89130410babb3eab28630d9d593fc5e48
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a website offering 'free Robux', a common lure for scams and malware. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this link points to known malicious infrastructure. While no scripts were explicitly extracted, the document body and embedded URLs suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/www.free-robux-hack.com-game-hack In PDF document text
    • http://sudamericarural.org/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/ho-to-use-roblox-hack-menu_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://sudamericarural.org/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-get-free-robux-2021_GM431946152.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_004_off000053b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B8 25256 bytes
SHA-256: b49bf204dab7e3fc6e55bb8a7ee379d447c6d79de71686dd5601ab7f48c6667c
font_01_sfnt_off00008e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off0000980d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980D 18936 bytes
SHA-256: 94632f42c197839b2ee37f7aa7fee25a21855f3d7902ea58eff29b2e12071ab3

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