Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad53bef4c9ec53b…

MALICIOUS

PDF

78.5 KB Created: 2021-02-27 21:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d59d339d70be18992f9e35fa6bcf0775 SHA-1: 754b8f46f998584acb9a919121a55c95fc17cdad SHA-256: 1ad53bef4c9ec53bf4c6aec69e3dd424335b2c36db978c16fb4e034a3c8a160e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are designed to mimic search results or informational content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=john+deere+950+cultimulcher+parts PDF link annotation
    • http://fortuneo-enligne.com/why_does_my_electric_stove_not_workbh2xs.pdfIn PDF document text
    • http://foxinawolukomat.iblogger.org/android_studio_import_arrayadapter.pdfIn PDF document text
    • http://kexufiloruruki.22web.org/broadsheet_sydney_best_lunch.pdfIn PDF document text
    • http://taxokisekajetek.22web.org/vascular_malformation_and_hemangioma.pdfIn PDF document text
    • http://tonagruz.ru/kokikap422cz.pdfIn PDF document text
    • http://misstourist.info/15988064369hlt0a.pdfIn PDF document text
    • http://itravelimpressions.com/5944165261673pq9.pdfIn PDF document text
    • http://eurostore.info/how_do_i_find_my_ip_address_on_my_laptop_windows_10omouk.pdfIn PDF document text
    • http://levantemosaic.com/axbridge_first_school_ofsted_report5218s.pdfIn PDF document text
    • http://ketorebagibof.22web.org/juice_menu_design_template_free.pdfIn PDF document text
    • http://edevletorg.com/curse_of_the_werewolves_full_apko639g.pdfIn PDF document text
    • http://invitesistem.ru/bajrangi_bajrangi_movieq2f3n.pdfIn PDF document text
    • http://rimka.xyz/associated_press_stylebook_201902ga2.pdfIn PDF document text
    • http://bavomobes.22web.org/48870464209.pdfIn PDF document text
    • http://uspeh.icu/ar-_15_exploded_parts_diagramfdh40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujukejesoteja.epizy.com/80581910779.pdfIn PDF document text
    • http://pinaroz.rf.gd/whats_the_definition_of_microbiology.pdfIn PDF document text
    • http://vitekek.epizy.com/40446773068.pdfIn PDF document text
    • http://zemadepa.rf.gd/platform_beds_with_storage_drawers_king_size.pdfIn PDF document text
    • http://gefuxexo.epizy.com/student_finance_working_abroad_form.pdfIn PDF document text
    • http://sowinoto.epizy.com/link_s_awakening_switch_guide.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_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 5724 bytes
SHA-256: 1afea57dc5c03a025a5242ff8dca118bb46dd87ba2679755de1368ee06c4afe0
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 10960 bytes
SHA-256: 061e3620d99fbb0c94f7dab872f479e07cadb4c0991cfe7672384e35cad79c0c

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