Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0708ddaaa9aa0b3…

MALICIOUS

PDF

41.3 KB Created: 2021-06-14 00:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b59546fc9f41d34000d776b1823dab33 SHA-1: 6e04c6450a2ff97c19871a048d8da8bb6464d2bd SHA-256: e0708ddaaa9aa0b36c30c1f14dd214fef4f0c915b43691113b2d8e0aa9c148fb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links, many of which point to external resources related to game hacks and free spins, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. The document's primary function appears to be directing users to download potentially harmful files from the listed URLs.

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 http://netcdn.co/app/431946152/free_noodle-roblox-game-hack
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/is-tiktok-free-app_GM835599320.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-items-that-are-now-expire-on-roblox_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/hacks-para-cualquier-juego-de-roblox-2021_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/hacks-for-coin-master_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-games-coin-master_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/roblox-g_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-face-roblox_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://anisio.eti.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000491a.bin
ee570515526010ea005b6ed9a9bb3459e04e211dfda2549a8d9c5520cf9008ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x491A 23812 bytes
font_01_sfnt_off00007f5b.bin
bc1a5543128f047fbdc82b52dfe9fc27e684240a40af98db2e0705ee780a8764
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5B 18152 bytes