Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d8bac5a09494d1…

MALICIOUS

PDF

42.6 KB Created: 2021-05-18 02:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f94f901cb59ab23cfbbb46403079d4f SHA-1: ba4d00f48773712aa6d0d74251734c87eefe7494 SHA-256: 60d8bac5a09494d1f3cc5cc620deb2ca71a97027630e526ebae5555b0deffbfb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a link farm, pointing to sites offering free in-game currency for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the PDF link farm heuristic indicate a social engineering attempt to direct users to potentially malicious or scam websites.

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-free-coins-game-hack
    • http://inextpresident.com/images/new-free-money-links-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-links-2021_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://inextpresident.com/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://inextpresident.com/images/roblox-verification_GM431946152.pdf
    • http://inextpresident.com/images/easy-way-to-get-free-robux_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-3533-android-hack_GM406889139.pdf
    • http://inextpresident.com/images/www-coin-master-hack_GM406889139.pdf
    • http://inextpresident.com/images/free-coin-master-account_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-games-download-free_GM406889139.pdf
    • http://inextpresident.com/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://inextpresident.com/images/free-coins-for-flip-master-online_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://inextpresident.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://inextpresident.com/images/hack-coin-master-mod-apk_GM406889139.pdf
    • http://inextpresident.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/free-robux-mobile_GM431946152.pdf
    • http://inextpresident.com/images/free-links-for-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-free-spins-link-may-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf0.bin
20d9c1b8209aa7dee62f1acabd8be5f56f2ee89c3c78e8ff9b69d7bb498d05a1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF0 25632 bytes
font_01_sfnt_off000085d9.bin
0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D9 17712 bytes