Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbb9606a83aa9e3…

MALICIOUS

PDF

82.2 KB Created: 2021-03-28 16:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ccd7d2785cd6ffc2dd5cc55ecda77dd1 SHA-1: c3cca1a1011e1f2c3bd2e6f06b74f4f5c36f926f SHA-256: 9cbb9606a83aa9e3265d3a2f194b04322a2baa5b1253632f688cc15b78303874
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or redirection scheme. The primary lure appears to be a common search query, 'Why is my jeep not starting', designed to entice users to click on the malicious links.

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
  • 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://jacksth.ru/strik?utm_term=why+is+my+jeep+not+starting PDF link annotation
    • http://pozijuza.scienceontheweb.net/absolute_value_inequalities_word_problems_worksheet.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/rufusuxejovuteke.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/23693631104.pdfIn PDF document text
    • http://ita-talia.fun/31100088072maww2.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/liijeoK/crazy_climber_arcade_cabinet_for_sale.pdfIn PDF document text
    • http://digovin.getenjoyment.net/rolokowaxumogusez.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/jcvhiK6/bass_dj_songs_free.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/kuduxoxen.pdfIn PDF document text
    • https://cdn.sqhk.co/zapevexuvot/ja9idjc/coffee_shop_3d_design.pdfIn PDF document text
    • https://tigasedoxopafu.weebly.com/uploads/1/3/4/7/134707490/8786248.pdfIn PDF document text
    • http://profaudit32.ru/what_if_my_license_expires_during_covid_in_nyck184.pdfIn PDF document text
    • https://cdn.sqhk.co/bukulavor/8ridOha/platform_white_sneakers_dsw.pdfIn PDF document text
    • http://meetsoda.pro/will_cyberpunk_2077_be_60fps_on_xbox_one_xny3ou.pdfIn PDF document text
    • http://1xbet-registr.site/wulejugonirejasewoseraziuyttt.pdfIn PDF document text
    • http://requiremcgood.com/rocketbook_review_ukr6wcv.pdfIn PDF document text
    • http://nout-sale.site/what_is_the_congruent_complements_theorem_meanwwtt7.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/b15fa5d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruvemad.myartsonline.com/noduxuraxijaluzupo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 5392 bytes
SHA-256: 9d6076e646760a8e56374fa2612270c38cd146eaaba3367b157dcf6128031359
font_01_sfnt_off000116d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D6 10872 bytes
SHA-256: e8f185eea2eaf56a1115f102dbfaedb25551ff123a28ab4b6ec2f82ae669b225

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