Malicious PDF — malware analysis report

Static analysis result for SHA-256 630b7c82ee2fba87…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 07:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f3052afc4bf05e5eef765310915070b8 SHA-1: 28bcba210f83daa3f598cd76da1bcf72d01c1331 SHA-256: 630b7c82ee2fba87c4a6e13f0f3cde3410e8bf9b72eb8349346ea2229b1d9887
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a document body that promotes free game-related resources, such as hacks and accounts. The heuristic findings indicate a link farm designed to direct users to external PDF files, likely serving as a lure for malicious downloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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-roblox-birthday-card-printable-game-hack PDF link annotation
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/download-roblox-jailbreak-money-hack_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/omggh-new-roblox-hack-lumber-tycoon-gui_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/descargar-roblox-hackeado-2021_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-someone-thinks-im-hacking_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-do-you-make-tshirts-free-roblox_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-font-that-looks-like-roblox_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-with-builders-club_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/follow-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/egg-hacks-for-roblox-dragon-adventures_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
font_00_sfnt_off00003247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3247 21960 bytes
SHA-256: ba23e324e2834ec3a96d47e3dce782dfc7dde6cd4c2b4b1ddcec20bac6f5fb35
font_01_sfnt_off000062c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 19548 bytes
SHA-256: 482520fe1158d2612d1b9ed5cee06f42d9be2342f60b4b0ef9ad70a86c0d4771