Malicious PDF — malware analysis report

Static analysis result for SHA-256 e276e680e859bdea…

MALICIOUS

PDF

68.3 KB Created: 2021-02-24 03:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 913f7fcfb37b1593080b8b8f34a31ad4 SHA-1: 6a33061ad87674af4bf7671dba6067e3052307a5 SHA-256: e276e680e859bdeab4cf42f3d2f4e3a97c932bce408ce9f635c30da6b735a18b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a redirector for a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=where+to+buy+pizza+pizzazz PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5ff634fbb2ad6.pdfIn PDF document text
    • http://setlyb.online/fajulovenelumodelat9eo.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/degubitewoxefijqaynt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fe0c716e4e11.pdfIn PDF document text
    • http://idealslimitaly-official.site/chemical_analytical_techniquesv9v4y.pdfIn PDF document text
    • http://conicppjry.bid/jenijexebisoxa07xhr.pdfIn PDF document text
    • http://summer-italy.fun/mercury_black_max_200_manuallqsjt.pdfIn PDF document text
    • http://teaitalis.space/mailchimp_template_vs_campaigna0a6w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_5fdc6c447479b.pdfIn PDF document text
    • http://xenogogumemikek.66ghz.com/plantronics_cordless_headset_manual.pdfIn PDF document text
    • http://1xbet-regi.site/veterinary_histology_samuelsonta7ai.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/gotitibekovi/medscape_physician_compensation_report_2010.pdfIn PDF document text
    • http://butadiviwev.rf.gd/openfoam_7_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/simple_restaurant_website_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/newsletter_templates_preschool_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/lather_and_nothing_else_answers.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_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 5000 bytes
SHA-256: 1f414fbfc18f056dc0c27c210a2589b5456dcd5e3511ecb0bfaa3e5db6d08b73
font_01_sfnt_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 10760 bytes
SHA-256: 8de6bf0a2adea363366e518d0ab034a928296877857fb2f92d752c950102c4ee

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