Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d78277fe87d006…

MALICIOUS

PDF

51.3 KB Created: 2020-06-16 20:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe426975b94125c12177bf7af412195b SHA-1: 4de6fc6465ebfdb5cac990b70be62aee1e14572d SHA-256: 87d78277fe87d0060f689942411e22f37a541cea0cfb09b5db49f704a89945ee
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact user-facing lure. The primary attack pattern observed is the mass distribution of external links.

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://godeco.fr/uploads/1/3/0/6/130621917/130621917.html#relation+and+function+class+12+pdf
    • http://sandwichislandsnetwork.org/uploads/1/3/1/4/131483772/4472362.pdf
    • http://oceanscasinogrand.com/uploads/1/3/2/3/132303175/puxamubenodajexoja.pdf
    • http://atlanticoceanshippingprofessionals.com/uploads/1/3/0/7/130776518/lejix.pdf
    • http://ecuriebarnton.com/uploads/1/3/0/7/130739260/7088533.pdf
    • http://limaelectric.org/uploads/1/3/0/4/130436074/8035751.pdf
    • http://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/mavavajufot-kidamajurin-kepupifo-vevirufe.pdf
    • http://hostmaster.whitstablefringe.co.uk/uploads/1/3/1/4/131409574/09f1c4.pdf
    • http://sunnyvalespikers.com/uploads/1/3/0/5/130551338/narepiki_foxasojekokabe_fufosokofo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dbd.bin
80c209fc251ce12c170b2ae871aac83463de234a04de2735e72f0d8d60d8bd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 5128 bytes
font_01_sfnt_off00007f49.bin
62ad4f3a7297522d69bf643a0f4d17314fcc876694e87b2d9e1ac763fa7712bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F49 12464 bytes
font_02_sfnt_off0000aa31.bin
8ce09ab288537ad2902c5fa4278ae25bbdb31745359d4167941a1bf7c63f8295		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA31 16496 bytes

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