Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf31aba88cea01c7…

MALICIOUS

PDF

40.6 KB Created: 2020-04-04 14:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 607313fe85ff2d5dbbbe4540e36d4373 SHA-1: bb778e03c400a8cbec4ab5b0aeeabf316af55126 SHA-256: bf31aba88cea01c7ab39fbaeb17dff579b6fbb68b78e4cdb39e1fe15f6d1a03d
62 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating a large number of external links pointing to various domains. The document body, though partially garbled, contains a reference to 'Sistema excretor para niños colorear' and includes multiple URLs that appear to be part of an SEO-optimized link farm strategy. These URLs are likely used to drive traffic or host further malicious content.

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://everestdobie.com/uploads/1/3/0/6/130639807/130639807.html#sistema+excretor+para+ni%C3%B1os+colorear
    • http://stonefoxfeather.com/uploads/1/3/0/7/130739839/17e335.pdf
    • http://angeloakinsurance.net/uploads/1/3/0/6/130604321/minaf.pdf
    • http://dokkanaccountseller.com/uploads/1/3/0/6/130620669/zexijobegim.pdf
    • http://fccmcgregor.org/uploads/1/3/0/3/130379098/wexiro.pdf
    • http://perutresdias.org/uploads/1/3/0/2/130287937/3194844.pdf
    • http://centroaddestramentocani.com/uploads/1/3/0/2/130271030/tivapokemiwuj-kubevizil.pdf
    • http://naplescitynews.com/uploads/1/3/0/7/130739852/b7a8861.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ea.bin
66b396c7ee133e9465a2baabf206fd90a1c17b648cee7841bd39a51f7d085929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 8844 bytes

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