Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bb1d8ddc7c6a87…

MALICIOUS

PDF

49.3 KB Created: 2021-05-17 13:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3eecd90eef2c2d8e894ec57770952f16 SHA-1: 315f0e57ab01ef3e830644bb753b5cead20a8c01 SHA-256: b1bb1d8ddc7c6a87fd28e3855cafc4d860cd930b8fbdbcae0a07c9961aea8c1f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains references to 'free Robux' and 'game hack', suggesting a lure for users interested in such topics. The presence of numerous PDF links and an embedded URL indicates an attempt to redirect users to potentially malicious or SEO-abusing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/games-that-give-you-free-robux-game-hack PDF link annotation
    • http://lookpaineis.com.br/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6E 26260 bytes
SHA-256: 8b4697f77798999a4007af5a046a8b2c40e3754f0b0c2fc3772d1494cba4e2c5
font_01_sfnt_off00008644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off0000902a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902A 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_03_sfnt_off00009b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3E 19168 bytes
SHA-256: c4d6735542cd49b50f18b2921f89e54fe5d8ee4af3f47c61005942af246faebd

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