Malicious PDF — malware analysis report

Static analysis result for SHA-256 8934c022eb6c76c5…

MALICIOUS

PDF

48.3 KB Created: 2020-03-29 06:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4dcab6168f3c1412622872afb875cee8 SHA-1: d30eeb2dabd3e40c37fcc60a4433ac2f884b3075 SHA-256: 8934c022eb6c76c5a45551bd84efc8efac814080e8131191210aecda726f5af4
62 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, a technique often used for SEO spam or to redirect users to malicious sites. The document body, though partially corrupted, contains the title 'Limites con factorizacion y racionalizacion' and references to 'wkhtmltopdf', suggesting it was generated to appear as educational content. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, pointing to a malicious intent to drive traffic to potentially harmful websites.

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://host37.carmichaelnl.com/uploads/1/3/0/2/130271177/130271177.html#limites+con+factorizacion+y+racionalizacion
    • http://buygreatweed.com/uploads/1/3/0/3/130379379/5526612.pdf
    • http://halalthisway.com/uploads/1/3/0/6/130620622/piruzusu.pdf
    • http://tutoryounsu.net/uploads/1/3/0/3/130379463/3953698.pdf
    • http://appliedwine.com/uploads/1/3/0/7/130739614/zifagoroma.pdf
    • http://artisanbathandbody.com/uploads/1/3/1/4/131414240/sekesu-volajov-xazizegi.pdf
    • http://consultleadership.com/uploads/1/3/0/5/130539843/869cd77f2c.pdf
    • http://webmail.drawmaton.com/uploads/1/3/0/5/130588663/muvaxobulu.pdf
    • http://love-in-the-afternoon.com/uploads/1/3/0/6/130620233/xedavu-sotol-lusukedajowoxe-temuzibipup.pdf
    • http://econogreen.org/uploads/1/3/0/4/130475981/zefejuxadi_wuvesobelavo_wujitow_mitebunezop.pdf
    • http://angelscenographer.com/uploads/1/3/0/2/130291499/97da250f8155c93.pdf
    • http://schreiberagserviceinc.com/uploads/1/3/0/5/130590008/2604284.pdf
    • http://gravelinelandscaping.com/uploads/1/3/0/7/130776250/8943ec39fe2a9.pdf
    • http://itsforthepeople.com/uploads/1/3/0/7/130739525/folagi.pdf
    • http://kemafamilyptyltd.com/uploads/1/3/0/6/130639343/piwax_pilomalivijad_jezinuviluxek_kapirifebu.pdf
    • http://suffolkcountyswimmingpools.com/uploads/1/3/0/9/130969818/kuxef.pdf
    • http://nammoi.net/uploads/1/3/0/2/130289244/1c841a1d031d2.pdf
    • http://eldersemporium.com/uploads/1/3/0/3/130379362/61c893e5834052.pdf
    • http://papadie2uscata.com/uploads/1/3/0/6/130605253/kotilibenuvod-buroforomer-zorojipavis-poniwapibi.pdf
    • http://isaglobal.org/uploads/1/3/0/6/130621582/kemow.pdf
    • http://buycialis.com/uploads/1/3/0/8/130814303/39496.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_off00006efb.bin
47262d5db2683f5c4f78c0618daeb1c32571c3da311b773b396d86dbbed7ac58
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 9828 bytes
font_01_sfnt_off00009294.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
pdf-font-stream PDF embedded font (sfnt) at offset 0x9294 2652 bytes
font_02_sfnt_off00009bfd.bin
3e9a9dfb40a01f9f7c9c545b28ba37f1de74591f2b47bc69a9983f40f3f3ebd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFD 16080 bytes