Malicious PDF — malware analysis report

Static analysis result for SHA-256 2397cd1efdf98295…

MALICIOUS

PDF

70.4 KB Created: 2021-02-17 07:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f2ffab22b6d72366fdbdf43392073503 SHA-1: 9c37035a606361b298ef176833a08ce9c56eb38f SHA-256: 2397cd1efdf98295bbb0523aa1aadf769c09f837f1f152ab408fc06206792201
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=homecrest+outdoor+furniture+wadena+mn In PDF document text
    • https://nuxabofubuwaxef.weebly.com/uploads/1/3/2/7/132740905/vowimutil-fagozixere-kaleb.pdfIn PDF document text
    • http://reduslim-shop.site/notations_21_theresa_sauerw0bzv.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/fiiohdj/praise_and_worship_songs_mixtape_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hdhcpje/nugevutukusasid.pdfIn PDF document text
    • http://hellesypakk.online/xolomejavobikakopaliyf0.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/jcgeEig/entergy_customer_service_number_louisiana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_5fd7238d981f4.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/TihISjf/76324088872.pdfIn PDF document text
    • http://neojust.ru/guidelines_for_stroke_management_20208qfis.pdfIn PDF document text
    • http://pmaider.com/another_quest_turn_based_roguelikes3mavo.pdfIn PDF document text
    • http://hookup682.site/vidmate_install_apk_2017l185s.pdfIn PDF document text
    • http://italiahot.space/23169890018m6l14.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/MUhixgi/dorar.pdfIn PDF document text
    • https://tidopotixasajev.weebly.com/uploads/1/3/0/7/130738881/fewifegedajif-jamavesutoker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD836 5188 bytes
SHA-256: cff63c7ab27fba6d22210b57b6c77fe0f5517efb003faeed959231ce11fea2d1
font_01_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 10184 bytes
SHA-256: 417b64880eb263801becd7a864d129ede8c3142b58be6670ae13d2759073b076

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