Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b597927e88c8eb6…

MALICIOUS

PDF

42.8 KB Created: 2020-03-07 14:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7afbc87fa9008bd6974c3763d6230ce3 SHA-1: 9af7ea0b90a50e286f32e13fef0f55d2ebae9e1e SHA-256: 3b597927e88c8eb6812efef252a23020db1770e807f46313f1407375b0997552
62 Risk Score

Malware Insights

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

The PDF file 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 distribution mechanism. The document body, though partially corrupted, contains a reference to 'Chinese olympic weightlifting book' and metadata indicating it was generated by wkhtmltopdf, which can be used to create PDFs from web content. The primary attack pattern appears to be directing users to a multitude of external resources, potentially for SEO spam or to serve further malicious payloads.

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://vpgrou.brdge.org/uploads/1/3/0/6/130603698/130603698.html#chinese+olympic+weightlifting+book
    • http://lanesportablerestroomsandseptic.com/uploads/1/3/0/5/130543373/pufoloz.pdf
    • http://gracechengcare.com/uploads/1/3/0/6/130640218/6695705.pdf
    • http://vixennaillacquer.com/uploads/1/3/0/6/130639304/wosekanufogore.pdf
    • http://miamibikelawyer.com/uploads/1/3/0/6/130640133/8132457.pdf
    • http://dishahealth.com/uploads/1/3/0/7/130776123/914bb6c.pdf
    • http://dabispop.com/uploads/1/3/0/4/130483770/gezexozovibonoj_vapufo_saveg.pdf
    • http://missouridwi.info/uploads/1/3/0/4/130483728/b52fa878.pdf
    • http://karageorge.net/uploads/1/3/0/5/130588639/7721583.pdf
    • http://www.4raven-tinypaws.nicolewhitewellness.com/uploads/1/3/0/6/130603936/dagam.pdf
    • http://www.thecalliopeproject.com/uploads/1/3/0/7/130776809/2d7718.pdf
    • http://www.tooldesignsolutions.com/uploads/1/3/0/6/130639714/8bfe8a.pdf
    • http://buckhillcoffee.com/uploads/1/3/0/5/130547024/708716.pdf
    • http://ml-md.com/uploads/1/3/0/7/130775704/jejevaredeve_bajonosepi_pikabuxepa.pdf
    • http://www.homeimprovementheros.com/uploads/1/3/0/2/130291838/raxumurifubu_jozaxuvo.pdf
    • http://acmbuenosaires.org/uploads/1/3/0/7/130740010/magukajomujazi.pdf
    • http://cyber1risk.com/uploads/1/3/0/6/130639593/f549b98606.pdf
    • http://pixieedust.com/uploads/1/3/0/2/130271083/xuferemuwofa-vatatoram.pdf
    • http://alicevonlindenau.com/uploads/1/3/0/7/130740521/5274444.pdf
    • http://videoglyph.org/uploads/1/3/0/2/130289734/puzuzoz.pdf
    • http://ckmitryremodeling.com/uploads/1/3/0/6/130639882/6a6c1.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_off00007cf3.bin
9c75b08805799babe065d576224073ba4d275ed2c04fe4b8414894081aed507e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 8612 bytes

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