Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b1b317fa39d532…

MALICIOUS

PDF

67.1 KB Created: 2021-02-10 02:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f0550abf46e15a67cab7978b732c8249 SHA-1: e9b5f3e1143c7d2eb76d5a2d369b3cbb3ade8c76 SHA-256: 61b1b317fa39d5328854b73e212dd8b6f448a216c385d271306803f080755403
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/aws?utm_term=free+manual+templates+microsoft+word PDF link annotation
    • http://vienvozvrat.site/83232654305eptm4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5fecc4dacc17f.pdfIn PDF document text
    • http://tlgfree.xyz/vapenefodupotenivusulkpopd.pdfIn PDF document text
    • http://dawavuwera.22web.org/1364903564.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/divikufifir/pulavofixejitojud.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/gebatizebirutagupejojax.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/audi_q5_2019_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/annual_report_of_bottlers_nepal_ltd.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/44250692231.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/fopopixixadatozolalom.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/email_writing_format_icse_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/zebosafugosasuresurubudex.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/internship_acceptance_letter_template.pdfIn PDF document text
    • http://manutilo.epizy.com/free_printable_billing_statement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/business_training_brochure_template_free.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_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 5348 bytes
SHA-256: 3f871e0b49b882940f99b99a1f1645e3396cd082d04cea286d02f17dd35d52e3
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 10040 bytes
SHA-256: 6a4743dca210198496ad1261b760c67290a38174b80855c0fb69e0cb20409f1d