Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc2b82f5efa0f13…

MALICIOUS

PDF

88.8 KB Created: 2021-03-30 16:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 61c17263ee527606a444d715d70ade8d SHA-1: de772762d800ec8e6f2d2e58743ff364a9a818da SHA-256: cfc2b82f5efa0f135af06904ada98c7c02451b0c58861df03c2b5068a19201b6
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with the primary one being `https://xajibur.ru/strik?utm_term=how+to+watch+marvel+movies+in+order+of+release`, which is presented as a lure related to movie release order. The document's structure and the presence of many links suggest it functions as a link farm designed to redirect users to malicious sites.

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://xajibur.ru/strik?utm_term=how+to+watch+marvel+movies+in+order+of+release PDF link annotation
    • http://thedefenseforge.com/53465516666wehid.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/w4ngfXb/pokemon_showdown_team_builder_download.pdfIn PDF document text
    • http://bapuvirovoko.22web.org/gamulonodepixexunijot.pdfIn PDF document text
    • https://cdn.sqhk.co/beluvano/ij6tHie/skylanders_imaginators_starter_pack_dark_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/0p7iahj/sevudumenobajovirol.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/fKYcXgj/crystal_report_c_pass_parameter.pdfIn PDF document text
    • http://obzorov.site/3918439152aam8q.pdfIn PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/9a1244.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/cf8404.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/hfceezd/kivivekiworemiluv.pdfIn PDF document text
    • http://imkl-checker.com/gefobefiritovanalo3jv3a.pdfIn PDF document text
    • http://wide-do.top/amaze_file_manager_free3iwvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/vozuzazabagokut.pdfIn PDF document text
    • http://xuvafinuvewabek.epizy.com/ahmedabad_city_information_in_gujarati_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/kenwood_ts_480sat_eham.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/vepomevo.pdfIn PDF document text
    • http://nikixoza.epizy.com/76074482121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6b4938-57ef-4f23-8ebc-fbd598b9204e/12074486719.pdfIn PDF document text
    • http://kewupuz.rf.gd/bufobawigefizomogen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c23d6ae-a4ac-45ee-bba2-ea2bc8bfa7e4/kenneth_hagin_books_download.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_off00011de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE1 5372 bytes
SHA-256: 1607a9675b57ac3c1a8dabbeae48111583d99d23148d284cc61ddd1a424c4d0b
font_01_sfnt_off00013012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13012 11116 bytes
SHA-256: a803f27a79e5bed07e3688360d61aa2698e6f354509a5e2eb849ecd3069bdf9f

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