Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf016e16f85935b9…

MALICIOUS

PDF

40.8 KB Created: 2020-04-04 13:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 44014ca63c1fc0b474178eb5a2dbbfac SHA-1: 3c17973fe6243cfb225594c3955cb6971dc7e63b SHA-256: cf016e16f85935b9e3e23935c28740167c7bfde945b75e6a5434513da75b43a8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The document body itself is largely unreadable due to encoding issues but contains metadata suggesting it was generated by wkhtmltopdf.

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://atl2020.org/uploads/1/3/0/8/130813922/130813922.html#funciones+del+administrador+de+empresas+ejemplos
    • http://homefromhomebandbwinchester.com/uploads/1/3/0/6/130620251/d73a061f98b.pdf
    • http://coloradosmortgageexpert.com/uploads/1/3/0/6/130621043/zutusatibilowivi.pdf
    • http://sharondycreations.com/uploads/1/3/0/5/130588157/tezizajev.pdf
    • http://trend36fashion.com/uploads/1/3/0/2/130288720/gatuwasisufeji-fukedajuj.pdf
    • http://smart-buildingproducts.com/uploads/1/3/0/8/130873782/8901679ea63d.pdf
    • http://alquimistagroup.com/uploads/1/3/0/3/130313170/zewojatilifoni.pdf
    • http://naumu.family/uploads/1/3/0/7/130739457/rufawupo-vinijej.pdf
    • http://111sog.com/uploads/1/3/0/8/130873848/753170.pdf
    • http://ucanmddocuments.org/uploads/1/3/1/0/131070481/6758920.pdf
    • http://holadronpepito.com/uploads/1/3/0/7/130739431/b24ae521.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_off000072d2.bin
a1806941763f430f6b331f3d8fafc198f67bbce9e4d4481a87b2ad1632cd5f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 9272 bytes

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