Malicious PDF — malware analysis report

Static analysis result for SHA-256 584fe8e4e6bfafad…

MALICIOUS

PDF

82.7 KB Created: 2021-03-03 04:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f8ff6a35078f4ee0c34a7fb7a3fe676e SHA-1: 6b44fae4d562779d0389c06fedf9d140b4d1e8c7 SHA-256: 584fe8e4e6bfafad3f350f490ecf743037409a2f5fefe238a8f4c4741ffe38f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the URLs, suggesting a tactic to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=maravilloso+desastre+saga+pdf+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6020b463dfff9.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/describe_the_life_of_a_peasant_farmers_unskilled_laborers_in_the_middle_ages.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413235/normal_5fcb9d55747c7.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/cobra_360_laser_14_band_power_cord.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/fCjeggd/vimajazewuwimusu.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/goperot.pdfIn PDF document text
    • http://xelipev.22web.org/25990870289.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/42655505173.pdfIn PDF document text
    • http://bixuvetojotenes.22web.org/renakisi.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/ccda_exam_questions.pdfIn PDF document text
    • http://salufogi.iblogger.org/ruwubafoxokom.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/ifE6icn/3d_escape_game_puzzle_rooms_1_level_43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402706/normal_5fe146ac19d47.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/cyrano_de_bergerac_italiano.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutupoda.rf.gd/your_zone_metal_loft_bed_assembly_instructions.pdfIn PDF document text
    • http://lurozakilaxa.rf.gd/kovetutepek.pdfIn PDF document text
    • http://tizurobele.epizy.com/how_to_use_bollinger_bands_indicator.pdfIn PDF document text
    • http://dopovis.myartsonline.com/31742304534.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 1560 bytes
SHA-256: c7b634934c831a90793e1a61e91011b2d2a0885e77f8cc03b6a378fabd1db9d8
font_01_sfnt_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 5388 bytes
SHA-256: 974d2952f508e4e63f83cb99388f818426d33e63162b34a7dce6bbd6a23a1f87
font_02_sfnt_off000114ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EC 11880 bytes
SHA-256: 165c62d6fcab7a7b11aad05758560bf2bb1178592e6f3aff9b1e44d45eda3a1a

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