Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c482b722a6cd12…

MALICIOUS

PDF

67.6 KB Created: 2020-03-26 15:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 08b2f467792187adde721880809a1ff4 SHA-1: dd8b7c53563ace75cb099fa142e0504a7264f7e7 SHA-256: d0c482b722a6cd12a560b2ad8d696dd5cf32f9fc33f264fe22a09080093ff7bb
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body text, though garbled, contains a URL that appears to be a lure for downloading content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of linked PDF files hosted on various domains, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://linksecurityconsultants.com/uploads/1/3/1/3/131384113/131384113.html#download+film+fanny+hill+1995
    • http://techtrade.ie/uploads/1/3/0/6/130620194/lavewejeravef.pdf
    • http://connectingtruth.com/uploads/1/3/0/6/130639959/danigisozariguveme.pdf
    • http://lifebydesigntribe.com/uploads/1/3/0/4/130489159/jipufedobaziki-pobiruxupig.pdf
    • http://mermaidexplorers.com/uploads/1/3/0/7/130776590/bozirasivoroleliru.pdf
    • http://thedivorcetango.org/uploads/1/3/0/9/130969938/fanetofuwarab_paxuzuvizu_gemilineg.pdf
    • http://eternalspringtime.com/uploads/1/3/0/6/130603740/740898.pdf
    • http://www.alessandrocavallin.com/uploads/1/3/0/8/130873975/d2321b41f7de35d.pdf
    • http://m.bearcreekanimalclinic.com/uploads/1/3/0/6/130620670/547d41ab11edf3.pdf
    • http://harrishomesteadfl.biz/uploads/1/3/1/1/131163760/gatolu.pdf
    • http://simplyparadise.org/uploads/1/3/0/5/130546538/zebinijaniwofel-zifuboxax.pdf
    • http://gddis.com/uploads/1/3/0/2/130292014/wesumurutuf-gozedup-gupusiritipu.pdf
    • http://ww2.thumbprintgallerysd.com/uploads/1/3/0/7/130775822/40e4c131.pdf
    • http://hostmaster.brandinsight.nl/uploads/1/3/0/6/130639700/4379362.pdf
    • http://rodneyspooner4senate.com/uploads/1/3/0/6/130639223/miberizosuga-faged.pdf
    • http://cavalierpoos.com/uploads/1/3/0/8/130874161/e28cb3c83.pdf
    • http://www.bullsnips.com/uploads/1/3/0/7/130738567/fisenujoliwem_lujunabeze.pdf
    • http://www.callisterconsulting.com/uploads/1/3/0/6/130605384/4732799.pdf
    • http://www.natalieannjamieson.com/uploads/1/3/0/9/130969555/mewoxoputa.pdf
    • http://waggintailsblueberryfarm.com/uploads/1/3/0/8/130813428/sezotetiman_guvozavoton_mutupop_fixuvu.pdf
    • http://tehditistihbarat.org/uploads/1/3/0/6/130621149/libaxezirosa.pdf
    • http://mesa-ayuda.com/uploads/1/3/0/4/130436096/f01d80.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_off0000dccc.bin
0a383baf7b8e0f2f4350a8a9ae737e922f0c7d06f0ccba57abbfbaa63ed6270a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 9960 bytes

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