Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf662abbe4fd15ec…

MALICIOUS

PDF

49.3 KB Created: 2020-04-21 03:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5a8221d9e24941e87f0699fba64f1eff SHA-1: ab42562815023c43cc3521ee879b380c773b329b SHA-256: bf662abbe4fd15ecc0befd784b4b61fc56780d9991040dcd3688436fe1d5c13d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to manipulate search engine results or host malicious content. The document body, though heavily obfuscated, contains text related to 'Laboratory diagnosis of myocardial infarction pdf' and references wkhtmltopdf, indicating a potential lure to a fake medical diagnostic page. The embedded URLs point to various domains, all likely serving as part of this malicious infrastructure.

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://ttmusb.com/uploads/1/3/0/9/130969702/130969702.html#laboratory+diagnosis+of+myocardial+infarction+pdf
    • http://washingtonwonderful.com/uploads/1/3/0/7/130775557/3144181.pdf
    • http://drummingupsupport.org/uploads/1/3/1/1/131164366/selolememulurekuf.pdf
    • http://steinmanlab.com/uploads/1/3/1/3/131398380/virizurororij-towabez-fitokopaw-kokupizezijudos.pdf
    • http://templehousepainting.com/uploads/1/3/1/1/131164231/9822954.pdf
    • http://tvsfl.org/uploads/1/3/0/5/130550731/7701209.pdf
    • http://ktsky1.com/uploads/1/3/1/3/131398171/kuxomata_mupewigorij_medakidu_kipipefuva.pdf
    • http://smartbuyerstech.com/uploads/1/3/0/5/130543351/322e38054c5c.pdf
    • http://shirkness.com/uploads/1/3/0/9/130969937/ruwezefitaxenozizo.pdf
    • http://talkingtreesllc.com/uploads/1/3/1/3/131379524/8d343b5db.pdf
    • http://newmusicempire.com/uploads/1/3/1/1/131163760/jolezanuxaw-bidaxodudubidat-duvarigedinox.pdf
    • http://schemario.com/uploads/1/3/0/7/130775622/giwifotajizipiwen.pdf
    • http://mytmch.com/uploads/1/3/1/4/131453416/b61d3e780.pdf
    • http://coachterrytennis.com/uploads/1/3/0/5/130544751/4254203.pdf
    • http://raesdollhouse.com/uploads/1/3/0/6/130621337/00e495806c5a.pdf
    • http://arcboycomputers.com/uploads/1/3/1/4/131453348/somofe.pdf
    • http://arcboycomputers.com/uploads/1/3/1/4/1314
    • 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_off000098e4.bin
da1894a2726c1d82ead1da229296f0d80d85c60ac2845be8a4f2e1ce9dde2bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E4 8472 bytes

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