Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf49ea867df72dc6…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 14:57:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6200e8d2a1c58805b59c6e4563c6e869 SHA-1: a72109a0226dc1c91f9b92c6d437acee8aad9097 SHA-256: cf49ea867df72dc606e9ce260d62bf38f5f09249ebfb6da6092f2a4a679cc588
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent call-to-action in its body text, promoting 'hacks' for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs points towards a phishing or scam attempt.

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/hack-to-get-unlimited-robux-game-hack
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/clean-master-free-coins-and-spins_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coding-for-roblox-free-v-bucks_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-videos_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-gold_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-70-spin-link-today_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-download_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-in-meepcity-2021_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-modded-minecraft-server-hosting_GM479516143.pdf
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-roblox-gift-cards-2021_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-apk_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-tiktok-views-trial_GM835599320.pdf
    • https://www.hearcolors.com.mx/img/blog/files/roblox-deathrun-hack-script-pastebin_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/robux-hack-tools_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-fan-page-facebook_GM406889139.pdf
    • https://www.hearcolors.com.mx/img/blog/files/i-want-free-robux_GM431946152.pdf
    • https://www.hearcolors.com.mx/img/blog/files/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003021.bin
85113a22ddcfa39485f38b6294b6e44028f5acfbac7f936185bc3822e0fad3b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22068 bytes
font_01_sfnt_off0000614b.bin
7de1da272f68dae8c68cd462da3d3007e8cec0cb1daa1adefa2e28129dcb1fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 19452 bytes