Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc23fa2a82a1e642…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 07:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 669936c708738a015eef1839cbed79fb SHA-1: 20e8461306527fceaa974c0045197257313bf0cb SHA-256: fc23fa2a82a1e6421979395f45990751e4229314890aeffa6bab0d3e03525af4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://resalured.ru/strik?utm_term=liftmaster+professional+formula+1+remote+programming PDF link annotation
    • http://lesanuzununefa.22web.org/newsletter_templates_powerpoint_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416494/normal_5ff7fa17b3c1c.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/certbot_renew_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449012/normal_5ff65c80511f4.pdfIn PDF document text
    • http://jotipire.iblogger.org/21610515287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fc6cbccd3d26.pdfIn PDF document text
    • http://pivojapigalotu.22web.org/21568208376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_602a0cead5531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punejiva.epizy.com/donor_letter_thank_you_template.pdfIn PDF document text
    • http://pokizepifowuw.epizy.com/75534561321.pdfIn PDF document text
    • http://zukusuvajijip.epizy.com/garodunuwafa.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_c6fcc060f62d45229daf5c521c3b0934.pdf?index=trueIn PDF document text
    • http://kurujabarufuxe.rf.gd/nice_guidelines_depression_treatment.pdfIn PDF document text
    • http://wuwusawoviwu.rf.gd/formal_letter_template_business.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_9024411acfdd4721b027bdf5f6aeec11.pdf?index=trueIn PDF document text
    • http://rojapaj.epizy.com/infective_endocarditis_treatment_nice_guidelines.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_96f21f657a6c41d98b288a80bf2a42e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/jofilozozefeteza.pdfIn PDF document text
    • http://mipitevana.epizy.com/powerpoint_template_design_finance.pdfIn PDF document text
    • http://zupotid.epizy.com/baixar_avg_pro_apk_2018.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_08c023e16a964883aa0525de61b795e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/does_canada_require_gre.pdfIn PDF document text
    • http://lunupoxupa.rf.gd/pumanebol.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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5212 bytes
SHA-256: 26d5da45b8c878e25fbc3d631a1114014f8b9a934452dc91aa19cf955ae48b8b
font_01_sfnt_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 10324 bytes
SHA-256: 2579bbb2e56241f3f647bc4d2ef321862422ea924ca587fe55b926944251154c

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