Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf6040304c69b83…

MALICIOUS

PDF

83.5 KB Created: 2021-02-24 19:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ea747e312783a5e1e67a9282e7dd6ab5 SHA-1: 4f6e7064fc59374dfb097eb1c691756ae6206d64 SHA-256: 4cf6040304c69b83f77bbde0b160f0bdb84c69f065d031fc56ffe84f67b61f3f
184 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=factors+of+production+activity+worksheet In PDF document text
    • http://dimabigeteg.iblogger.org/masabojobimevanolulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5fc7620e0226c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_600dc6210957d.pdfIn PDF document text
    • https://gugakelu.weebly.com/uploads/1/3/5/9/135965899/danenepipusuj.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/4893344.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/84a73.pdfIn PDF document text
    • http://zinifezabi.iblogger.org/b_p_l_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_600cf65a4aa3a.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/6329594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489980/normal_6031bf2abff16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_601a4a1e00e77.pdfIn PDF document text
    • http://xetanorimenu.iblogger.org/golf_scramble_flyer_template.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/laroro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ponogifivow.epizy.com/gijaxemaxajumaki.pdfIn PDF document text
    • http://nufapuruwibixi.epizy.com/how_to_unlock_graco_stroller_front_wheel.pdfIn PDF document text
    • http://todizegi.epizy.com/case_study_method_in_research_methodology.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/vemilaxivu.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/compact_set.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_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 5484 bytes
SHA-256: e0c04a2319461e1d7757218252636c1baafc406f78c14effabd3a139ba4dd285
font_01_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 11124 bytes
SHA-256: a49c6c3e75aa18a571a5a7ed6b7d013d0119219467cd196a136954973a7d9ce1