Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a63645f3b730b3…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 05:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 17fea151a77f3958976e0e7e2104639f SHA-1: 67f4fd35ea9b93a1f990e1ab150dd63f381c8114 SHA-256: f1a63645f3b730b309bffb617a1bbfd0857c517aa99d66b9629f7fb55c301020
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a "Free Robux" theme to entice users. It contains a significant number of external links, forming a link farm designed to direct users to other potentially malicious or scam-related content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual download button further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-no-games-to-play-game-hack PDF link annotation
    • http://www.hlad.hr/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spin-today_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
font_00_sfnt_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22264 bytes
SHA-256: 8d4eabd6b644b98d2a1132b51e8f1684b6b3d403d931f0e2be9ca41a9b8212d1
font_01_sfnt_off000060eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 19384 bytes
SHA-256: 23fa94cf8db1094c50597560888f7cb9b3197379d1f5c40ae762d3505353dd8a