Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0280eaedc9a2e28…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 03:57:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c76c6b2975d0f7ecf12a713230d57c23 SHA-1: d7707f157c89a7eb6fc078d5f6c3bfadf00e4d9c SHA-256: e0280eaedc9a2e28087145d39e572ee476cfac44180368af2fb79fb2c2f9ead3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that promotes free in-game currency for 'Coin Master' and other games, acting as a link farm. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS score is very high. While no scripts were directly extracted, the structure and content suggest a phishing or scam attempt designed to redirect users to potentially malicious 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-free-coins-no-human-verification-game-hack
    • https://emindonesia.com/assets/CKImages/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spin-app-reviews_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/free-roblox-clothes-and-hair_GM431946152.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-hack-link_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spins-2021-ios_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spin-27_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/free-coin-master-spins_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/links-to-free-spins-on-coin-master_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/free-links-for-coin-master_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-daily-free-coins-link-today_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/coin-master-free-spins-cash_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/free-robux-not-a-scam_GM431946152.pdf
    • https://emindonesia.com/assets/CKImages/files/free-game-pack-coin-master_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/roblox-hacks-2021_GM431946152.pdf
    • https://emindonesia.com/assets/CKImages/files/multiplayer-master-hack-coins_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/how-to-get-free-robux_GM431946152.pdf
    • https://emindonesia.com/assets/CKImages/files/master-coin-hack_GM406889139.pdf
    • https://emindonesia.com/assets/CKImages/files/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004939.bin
908486df7e49d9bbe4ea6422292769f2a930f59ad184d001a778e0b13fde9717
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4939 24704 bytes
font_01_sfnt_off0000819e.bin
bf3fe32e7bdb8dff11b484033bf5381a512b4267db5012b87197df855ee77eab
pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 18244 bytes