Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea8be9aa970f209…

MALICIOUS

PDF

36.1 KB Created: 2020-04-04 07:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 710c2228568478f8ee71391297e7d887 SHA-1: e721b20d5ae89c57f1b0441a68358303e38aca93 SHA-256: dea8be9aa970f20956deb5f894471a56786024fa03c3460d5c7f329d8c8a8c56
62 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or a mechanism to distribute malicious content across multiple sites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the link farm. The primary IOCs are the numerous external URLs found within the document.

Heuristics 3

  • 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.
  • 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://diabeticfriday.com/uploads/1/3/0/2/130271083/130271083.html#contexto+hist%C3%B3rico+del+romanticismo+literario
    • http://mandakemp.com/uploads/1/3/1/3/131398582/7b25777d60192.pdf
    • http://drbrettagrant.com/uploads/1/3/1/4/131406435/mevataruleda-paveseru-rokipise.pdf
    • http://qsaft.com/uploads/1/3/0/2/130291453/zejebajaf.pdf
    • http://farm-nerves.com/uploads/1/3/0/7/130776196/18600120f98faa9.pdf
    • http://meridenasphaltpaving.com/uploads/1/3/0/5/130551597/2387433.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000756c.bin
da7833a4bc0a17b2c7461dc030a071df4f3a108794d6439dcddfe9b92e158b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 9136 bytes

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