Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80f1276ca04d06c…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 19:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d2c424fae69835fb64292429c4b4fa7 SHA-1: c2352a3d9694a6e876a9391075de3d3a3f971144 SHA-256: a80f1276ca04d06cf3db819f5d211df6d30eefeaabf8679cbc263b2e0d93442f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which appear to be SEO-optimized for gaming-related lures like 'free spins' and 'free Robux'. The document body, though partially corrupted, contains references to these lures and a URL pointing to 'netcdn.xyz'. The presence of a PDF URI heuristic and the sheer volume of linked PDFs suggest a link farm or a distribution point for further malicious content. No scripts were extracted, but the overall structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-daily-free-spins-link-today-2021-game-hack
    • https://www.milewood.co.uk/images/how-to-get-free-robux-without-email_GM431946152.pdf
    • https://www.milewood.co.uk/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • https://www.milewood.co.uk/images/free-robux-on-iphone_GM431946152.pdf
    • https://www.milewood.co.uk/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://www.milewood.co.uk/images/free-robux-legit_GM431946152.pdf
    • https://www.milewood.co.uk/images/free-spin-link-coin-master-today_GM406889139.pdf
    • https://www.milewood.co.uk/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://www.milewood.co.uk/images/coin-master-gold-cards-hack_GM406889139.pdf
    • https://www.milewood.co.uk/images/coin-master-hack-activegamer_GM406889139.pdf
    • https://www.milewood.co.uk/images/coin-master-claim-free-spins_GM406889139.pdf
    • https://www.milewood.co.uk/images/free-spins-coin-master-unlimited_GM406889139.pdf
    • https://www.milewood.co.uk/images/free-minecraft-java-account_GM479516143.pdf
    • https://www.milewood.co.uk/images/roblox-robux-hack_GM431946152.pdf
    • https://www.milewood.co.uk/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://www.milewood.co.uk/images/free-robux-generator-no-verification_GM431946152.pdf
    • https://www.milewood.co.uk/images/coin-master-viking-quest-hack_GM406889139.pdf
    • https://www.milewood.co.uk/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • https://www.milewood.co.uk/images/free-robux-hacks-no-verification_GM431946152.pdf
    • https://www.milewood.co.uk/images/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://www.milewood.co.uk/images/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004adb.bin
d950577a67e51e9c3acbbd3fa1b3669c1ff45838eb3b857edcfb101eff9b35c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADB 24620 bytes
font_01_sfnt_off00008284.bin
51ec1fd699785aa8f843f12306ac352f9679003eb9b4544ea09afbac11be1d71
pdf-font-stream PDF embedded font (sfnt) at offset 0x8284 19052 bytes