Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0bc3daa216a06b…

MALICIOUS

PDF

43.7 KB Created: 2021-06-11 12:54:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 79c2503d69e28df56c7cc541d444b2a4 SHA-1: db734465dde76ed8c04bd9c2b42acdae8f3d5022 SHA-256: 4d0bc3daa216a06b6b4154c38186ff0e6bcb03d01091ab9872113e521e776d00
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, specifically `https://netcdn.tw/app/431946152/www.roblox-jailbreak-hack-game-hack`. The document body, though heavily corrupted, contains references to game hacking and download lures, consistent with a malicious document designed to trick users into visiting the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.roblox-jailbreak-hack-game-hack In PDF document text
    • https://www.sd-olimp.hr/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/hack-roblox-using-artmoney_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/tiktok-freepik_GM835599320.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-skywars-money-hack_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-2021-without-verification_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_off00004eb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB4 24688 bytes
SHA-256: d49140cfa7f8183c4804e2fce6dd6df76a489f232cff6f1aafb9f6a5d64aca4e
font_01_sfnt_off0000860f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860F 18896 bytes
SHA-256: 62456bc750f178e32294d245f237eae2bbcc82a1803cc630883343cc79bbc980