Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e32237cefadcce4…

MALICIOUS

PDF

43.8 KB Created: 2021-05-14 00:11:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc688bd8bf370090e7a03445545b0be2 SHA-1: 9f4664eb0a6531d72bd4e6e7066ae10a09434748 SHA-256: 8e32237cefadcce490a1ef4ea7ab4f0c844e26101cb7f4309a542b38990485a8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files. The primary URL, https://netcdn.xyz/app/406889139/coin-master-email-rewards-link-game-hack, suggests a lure related to game rewards. The heuristic PDF_SEO_LINK_FARM indicates a mass external link farm, and ML_NYX_PDF_MALICIOUS confirms a high probability of maliciousness. The document body, though heavily obfuscated, contains references to game rewards and links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-email-rewards-link-game-hack
    • http://facingachild.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://facingachild.org/images/coin-master-heaven-free-spins_GM406889139.pdf
    • http://facingachild.org/images/real-free-spins-for-coin-master_GM406889139.pdf
    • http://facingachild.org/images/free-robux-websites-that-work_GM431946152.pdf
    • http://facingachild.org/images/free-25-spins-coin-master-links_GM406889139.pdf
    • http://facingachild.org/images/is-minecraft-java-free_GM479516143.pdf
    • http://facingachild.org/images/minecraft-auto-miner-hack_GM479516143.pdf
    • http://facingachild.org/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://facingachild.org/images/coin-master-hack-apk-2021_GM406889139.pdf
    • http://facingachild.org/images/free-roblox-clothes-boy_GM431946152.pdf
    • http://facingachild.org/images/coin-master-game-free-spin-download_GM406889139.pdf
    • http://facingachild.org/images/free-spins-coin-master-facebook_GM406889139.pdf
    • http://facingachild.org/images/coin-master-server-hack_GM406889139.pdf
    • http://facingachild.org/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://facingachild.org/images/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://facingachild.org/images/roblox-generator_GM431946152.pdf
    • http://facingachild.org/images/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://facingachild.org/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://facingachild.org/images/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://facingachild.org/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004781.bin
a8958bfb9c7af4324fec090e3d4665ee71d59474195b3aa200e305e705f29344
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4781 29788 bytes
font_01_sfnt_off00008899.bin
64cb04ece7ee92720496beade2ddf5418fbdb83628caad053a3eb83208978ed4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8899 18388 bytes