Malicious PDF — malware analysis report

Static analysis result for SHA-256 be46040833eced63…

MALICIOUS

PDF

73.3 KB Created: 2021-06-08 06:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2433acfccbd5358ee1b4dae6f06d3e31 SHA-1: 0eda7d3cab9ad3a2f6ab742fb1d7f4e0154d8087 SHA-256: be46040833eced632bd53ef203330b3af9f90019928c4a0a22bbb59718f12bcf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm or a lure for phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=oraci%25C3%25B3n+de+sellamiento+con+la+preciosa+sangre+de+cristo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379234/normal_604756f35ccce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479236/normal_5fe91ba673bda.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/6270917.pdfIn PDF document text
    • https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/a65e7e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_60546db939fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_604d7778e5a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_60b9c8edb3950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fe1166ca96ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_603e29800da0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_60bc09acb5b0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5ffc2e17baf20.pdfIn PDF document text
    • https://wumupozokowep.weebly.com/uploads/1/3/5/3/135346219/74c750626d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_60632e49239d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazoridixilu.pbworks.com/f/mobulilixunalapow.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144528459/kaxovadevuvugob.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/59882138685.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144521466/job_offer_letter_from_employer_to_employee_australia.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144705669/problemas_de_aplicacion_de_tringulos_rectngulos_resueltos.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/imyfone_d-back_registration_code_and_email.pdfIn PDF document text
    • http://gobujirewod.pbworks.com/w/file/fetch/144720084/mizakutitunenedutetaxaba.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_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 5556 bytes
SHA-256: 38bea073abeb8ca3f2a6ff53ae05e8bebb53d7b93acb6464287357573a4fd35c
font_01_sfnt_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 11240 bytes
SHA-256: d10fc4e45e1f161523300bcc6ff41e9e489eb06193063a093a3f7656fee70d08