Malicious PDF — malware analysis report

Static analysis result for SHA-256 4886dce8668193df…

MALICIOUS

PDF

75.1 KB Created: 2021-02-19 06:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c7554ad252853444523bffdc532f84dd SHA-1: dda99f8a20b298306b16c6635ce8f31b2be8dbb7 SHA-256: 4886dce8668193df91628f191e3024fb3bfdb192ee0e21ac682486c87bc70552
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/strik?utm_term=how+to+check+your+sexuality In PDF document text
    • http://anrostore.ru/el_camino_del_artista_en_accion4ypgn.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/chloroform_use_in_oral_medicinesjemb0.pdfIn PDF document text
    • http://reabook.online/16168283014rrcqs.pdfIn PDF document text
    • http://debugor.iblogger.org/what_is_the_statute_of_limitations_on_assault_in_illinois.pdfIn PDF document text
    • http://fredo.bike/adobe_acrobat_for_pc_windows_74541p.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jiidDjd/24070918894.pdfIn PDF document text
    • http://docita.fun/how_to_do_percentages_in_google_sheetsbii0a.pdfIn PDF document text
    • https://xubajibagi.weebly.com/uploads/1/3/1/3/131378916/joturiroluj_nujefusi_tikoleno.pdfIn PDF document text
    • http://firstdoctor.xyz/the_diplomat_restaurant_milwaukee_wisconsingq0gu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulakitukubipi.epizy.com/future_tense_worksheets_for_grade_5.pdfIn PDF document text
    • http://tididesonorevo.rf.gd/budget_2019_malaysia_bahasa_melayu.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/bible_verses_images.pdfIn PDF document text
    • http://mezubivedoxida.epizy.com/20564907843.pdfIn PDF document text
    • http://zitejilid.epizy.com/jewepiti.pdfIn PDF document text
    • http://zenowalu.rf.gd/aip_aeronautical_information_publication_switzerland.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_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 5176 bytes
SHA-256: f5ce5f5f38e64a463b05888247f2c62adaebb8c86eb0cbdd9963ed0b4999e08f
font_01_sfnt_off0000fb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 10700 bytes
SHA-256: 00d5baf155d158f9390dee15ea76bb888cf4912c6934cf4cd41cc5e2e5a4686c