Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0301ea26ead98d5…

MALICIOUS

PDF

85.9 KB Created: 2021-04-07 06:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5db450fce27f7bd5fe6110ba6c57a9f7 SHA-1: 2f4afded6ab49ce67ac057e74904b2215f1c38cb SHA-256: d0301ea26ead98d55f9a92d47cc3b325c061730f05f6c9d9c023552bda1b17ed
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain ('jumiwimov.ru') that is flagged as external. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=game+of+thrones+book+set+1-7 PDF link annotation
    • http://kogefidol.iblogger.org/linear_equations_in_one_variable_worksheet.pdfIn PDF document text
    • http://wavulefarunatev.iblogger.org/72246415356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6057114633f2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_5fc649bce4503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_60345cd79aadc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_604cf328846ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/44cd1e7e-d53f-43c1-9748-4dc4a1d97a80/fundamentos_tecnicos_del_voleibol_resumen_corto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300ee653-6966-4495-bcd5-cb1fe269681f/31809546036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd8b589c-5079-4749-ac83-c6d4598fda5d/marvel_schebler_carburetor_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202a03d2-2caa-485b-99eb-b3e9ef97d085/wemosovukokagazanomo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/anker_a7908_not_turning_on.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/what_are_examples_of_career_development_goals.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/anm_form_date_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcdb533-4900-45aa-91d6-1f33660dfff2/annihilation_of_caste_babasaheb_ambedkar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12107e50-9f75-4816-bd38-5a848cf0b319/bob_books_set_4_reading_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc65ec6b-68c4-4c3c-bcd4-b4d9a68b7059/cat_electric_forklift_for_sale.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/tawotezutodalifimevib.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/exercises_to_relieve_piriformis_muscle_pain.pdfIn PDF document text
    • http://zivomunigewelo.rf.gd/53411268091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67deee85-69d6-4502-8c83-d1515af06a05/administracin_de_medicamentos_por_va_oral_definicin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe051eb-4fad-48f2-a60d-2c1f5d23ac71/used_dillon_reloading_press_for_sale_craigslist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5735fc-a7a2-4302-ba26-b9de76f1cfc8/how_long_are_graco_my_ride_65_car_seats_good_for.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 5116 bytes
SHA-256: 5c156035bd515c139fa731b2c2d17eb4c185c56fbcfc3e392aa53fbb5c6f9deb
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 12040 bytes
SHA-256: 9819b7461fcbc5b9e41129a12b6c627e529fad33c0bb71ac3178c7d7e30491b8
font_02_sfnt_off00012713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12713 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2
font_03_sfnt_off00013bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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