Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b403dcba04f6f2…

MALICIOUS

PDF

44.3 KB Created: 2020-04-05 15:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 56f16d6867e7932c1e1514e14694c302 SHA-1: 9fd7a8ba019308669a58b66c1675fd9fa20e942f SHA-256: d8b403dcba04f6f2bbbaee20878fcfed5e69f9ef9e7953f82909e1c6fc7ddd52
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO link farming or to distribute malicious content. The document body text, though partially corrupted, includes a URL that is also part of this link farm. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. No scripts were extracted from this sample.

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://spreadsrendering.com/uploads/1/3/0/6/130639947/130639947.html#que+ocasiona+la+descomposicion+de+los+alimentos
    • http://ryoshinakamura.com/uploads/1/3/1/0/131070633/pobavoj.pdf
    • http://agapehousewellness.com/uploads/1/3/0/8/130815437/1c8ca029376934.pdf
    • http://unitedpolitics.net/uploads/1/3/0/5/130544240/3467378.pdf
    • http://sully-location.ch/uploads/1/3/1/4/131438592/zumozinowozuvo.pdf
    • http://funkylittlefeet.biz/uploads/1/3/0/4/130435511/6ecc30.pdf
    • http://artrabell.com/uploads/1/3/1/1/131163838/zufomeg.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b9d.bin
14208f546eab299ce8867ace37234bd9c93548c901dcb60c26f07a3371b5c230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9D 9356 bytes
font_01_sfnt_off00008d97.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D97 16036 bytes

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