Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ba6e15566dbff6…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 13:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d57a6315704834fad660ef089ccac578 SHA-1: c39ac5c0bf05b525dcc459a7848aaccaa4056ca9 SHA-256: b4ba6e15566dbff6caaeb2a1c812742dd35e8588c1af9c9f32a9af06df5ad025
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://netcdn.xyz/app/406889139/http-bit.ly-coin-master-free-2021-spins-game-hack'. The document body and embedded artifacts also suggest a lure related to game hacks or free currency, further supported by multiple embedded URLs. The presence of a visual download button heuristic indicates a user-interaction-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/http-bit.ly-coin-master-free-2021-spins-game-hack In PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/rbl-gg-free-robux_GM431946152.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_003_off0000492b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492B 24160 bytes
SHA-256: 2a029984e06f7e5f9035703f7fc6356333aaa7bb9c928b024e6754453486b4c7
font_01_sfnt_off00008007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8007 18824 bytes
SHA-256: 7e3049b9a5a0ae93670f4a3987e867be19f2251f6b8a6c3356ce1f88b75303f6

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