Malicious PDF — malware analysis report

Static analysis result for SHA-256 95472025ae2ea298…

MALICIOUS

PDF

75.6 KB Created: 2021-03-07 22:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3372f36aa86eaf60f92b38deb0804cd4 SHA-1: 86010beddbc3344ddb65af81cb3f408621a370dc SHA-256: 95472025ae2ea2989d304c3eaed2c803c0836397338416d5b842c008f83800f5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://mezovuduw.ru/strik?utm_term=how+to+open+bonaire+evaporative+cooler PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4c65687357.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/bgfVqij/32284531481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_60386c363f6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407749/normal_5fee426fa5c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_603ba44218441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_603e4908af105.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/5Jkgdhf/fofinuletuwalemawesejiker.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/ctjegeM/dazavisupewum.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jOkijh5/xugelugave.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/eDIhidE/53915801545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_600fd758b986f.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/lugebiwutugulunujis.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/4291185.pdfIn PDF document text
    • https://namewedopuso.weebly.com/uploads/1/3/4/5/134583017/6717206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416940/normal_6001cc8e19d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_600da3b69483d.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/S9hhqxZ/vodunirikosegipotute.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/gipesinobufete_wusuvurus_sijetorowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fe1caae65760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fd77711cfb78.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/gh1giib/music_player_app_download_for_pc_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/37356210666.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/1302905198.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/70372912653.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/ativador_office_2010_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/juwoxa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 5004 bytes
SHA-256: d04b18908040e859b37b00c8420392993e5cd2fb9d6834b4d40babb6f6bc385d
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10300 bytes
SHA-256: cf169082eecf65caaaee4e66b1564949bb69777e44bfc5923c35fdc76ff1de0d