Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af81ca438205c22…

MALICIOUS

PDF

40.7 KB Created: 2020-03-24 07:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 95d5fe8b9f93839ebc03820dadaac600 SHA-1: a1c10d98f4bb747cb83ab1c7e1b8c809ae5cbcb3 SHA-256: 1af81ca438205c222b5e8fac93b8a555c6110d74f47ddc3e8c21dc592f36966a
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection scheme. The primary URL extracted is http://conorcleary.net/uploads/1/3/1/0/131070098/131070098.html#tolkien+beren+and+luthien, which appears to be part of this network. The document body contains garbled text and metadata, but the presence of numerous external links is the most significant indicator of malicious intent.

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://conorcleary.net/uploads/1/3/1/0/131070098/131070098.html#tolkien+beren+and+luthien
    • http://stylesforyourhealth.com/uploads/1/3/0/9/130969322/63a027bd6a2.pdf
    • http://connectionsib.com/uploads/1/3/0/7/130775435/ce6e5a1e08d5eaf.pdf
    • http://agouracouplestherapy.com/uploads/1/3/0/3/130379216/goninugutolepa.pdf
    • http://michigantalks.net/uploads/1/3/0/2/130289669/wavemekaragoloz_tezedosuf_xawit.pdf
    • http://tristarlogos.com/uploads/1/3/0/8/130874165/1123025.pdf
    • http://alaskarvadventures.com/uploads/1/3/0/2/130289371/tosefukeguviz.pdf
    • http://rudgeramos.com/uploads/1/3/0/5/130588806/xorimivuw.pdf
    • http://jabugotours.com/uploads/1/3/0/7/130738911/9324113.pdf
    • http://tcproturflawncare.com/uploads/1/3/0/6/130621307/6971477.pdf
    • http://adiposewild.com/uploads/1/3/0/4/130488398/5011318.pdf
    • http://cruisecontrolskateboards.com/uploads/1/3/0/2/130289535/batifodijigijulo.pdf
    • http://www.brookeward.com.au/uploads/1/3/0/4/130483817/bf8b413bac7.pdf
    • http://ameleyounsi.com/uploads/1/3/0/7/130776855/22de4df191016b4.pdf
    • http://saporousfoods.com/uploads/1/3/0/7/130739993/botukanetutijin.pdf
    • http://caseybradleyarts.com/uploads/1/3/0/5/130543272/70086503f7b5.pdf
    • http://withoutshores.com/uploads/1/3/0/7/130775659/potemuwela-goromajudar.pdf
    • http://creedompublishing.com/uploads/1/3/0/7/130738919/304903.pdf
    • http://natronacountyclassifiedprofessionalsassociation.org/uploads/1/3/0/4/130475921/3d0d6441.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_off00007477.bin
18be95ae1bfdf5b04358b3fb858cb3e95727fb0d5a9b26d2e74ecda5faefdf14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 8540 bytes

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