Malicious PDF — malware analysis report

Static analysis result for SHA-256 4981a7411e03307f…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 00:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6587126999e98070a1823a48af016891 SHA-1: 52913eb09c7217bb2e510189082e4540ee15a53f SHA-256: 4981a7411e03307f284c29c9936be18cfbf47e7b22c9734fbbc71e20165b670a
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=mc+attunement+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_6014fe0c78fed.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/weather_report_clinton_md.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/56674905758.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_6005b1266f3d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407327/normal_6002d822d4477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donirodep.epizy.com/ledugudiberoxikux.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/85386384376.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/66641156382.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/49563769495.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/bioflix_activity_protein_synthesis_rna_processing.pdfIn PDF document text
    • http://renawexit.epizy.com/samsung_wf220anw_xaa_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/cell_membrane_transport_worksheet_answers.pdfIn PDF document text
    • http://leriwegozeko.epizy.com/which_brand_of_blood_pressure_monitor_is_the_best.pdfIn PDF document text
    • http://sunuwib.epizy.com/hatchet_gary_paulsen_book_online.pdfIn PDF document text
    • http://gabixemi.epizy.com/servicenow_fulfiller_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/marketing_calendar_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/98474962641.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/apocrifos_del_nuevo_testamento.pdfIn PDF document text
    • http://biwovake.rf.gd/minuet_in_g_minor.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_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 4956 bytes
SHA-256: 1cf9572270722c1caf29f5188c2a937f62ed6d4a20109e45624f6124da9f947b
font_01_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 9972 bytes
SHA-256: 7e571f8abe3e62aab677b8a586cb98f2e510e3e74e0e3d7d880a67d023bcdc53

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