Malicious PDF — malware analysis report

Static analysis result for SHA-256 55313666e3188262…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 05:35:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0da33040626ba239dd0bd6a0a438385b SHA-1: d06f9bcd3f750ca4b4fbe13e7f63459b5ac16bde SHA-256: 55313666e31882622c81ce2f8e97684b02c728f78f65c7ee442009f4c16cfd47
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to websites offering game cheats and hacks, indicating a likely attempt to distribute malware or lead users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including a specific URI to 'lazyblox-com-free-robux-game-hack', supports this assessment. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to these potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/lazyblox-com-free-robux-game-hack PDF link annotation
    • http://pianoservice.com.ua/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://pianoservice.com.ua/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://pianoservice.com.ua/images/rbx-hut_GM431946152.pdfIn PDF document text
    • http://pianoservice.com.ua/images/roblox-hacked-version_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
font_00_sfnt_off00004674.bin
84017c98d96e5a854a3dd1577236ff181a22d266ed2f42f45366376a3d24929c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4674 25168 bytes
font_01_sfnt_off00008043.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 5696 bytes
font_02_sfnt_off00008d55.bin
c7a12f46af2ab2e47f5138dce66a585f9a7928693d977e55c66cac0a0236f754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 18840 bytes

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