Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed40de38f8eea574…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 01:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 42f3285f015a801d05e91a7510a20088 SHA-1: 2bbc381d00793864aa9f27f0575318f7662e47db SHA-256: ed40de38f8eea57404fbb024db1196294c0e1ccb6ce1b2178107aca09f65b090
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link to known malicious redirector infrastructure, specifically disguised as a 'Roblox Hack'. The document body and embedded URLs reinforce this theme, suggesting a lure to download or execute a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/http-rbgen.appzoneteam.com-roblox-hack-game-hack In PDF document text
    • http://bressanassessoria.com.br/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/roblox-free-online-no-sign-up-or-download_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/roblox-hack-android-1_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/roblox-royale-high-cheats-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-spins-coin-master-no-survey_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
stream_004_off00005329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5329 26108 bytes
SHA-256: 6b0c9fac21ef55d2489697a9f910a3ca66036b2a272a03743dd0f28a06921e38
font_01_sfnt_off00008d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D59 19160 bytes
SHA-256: 5977f089bce8eb946ebe64183c7d0e82bcb4008ff43ba5e38491cfe7026aaf7a

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