Malicious PDF — malware analysis report

Static analysis result for SHA-256 230e68fab97c64f1…

MALICIOUS

PDF

80.9 KB Created: 2021-03-18 11:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3f35e4b103331f6f9066e116682827fc SHA-1: edb7d210fe5e847d5b0d6b0cd6fefe7bde82e3ea SHA-256: 230e68fab97c64f112076777a6a47a85b9d1c634bf7eba8a3420c2322f2f9ced
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, indicative of a link farm designed to obscure the true destination. Heuristics and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the ML classifier output further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://gimoguvi.ru/strik?utm_term=how+to+get+construction+cost+estimate PDF link annotation
    • http://datulosuwila.iblogger.org/walexagiwinexolesit.pdfIn PDF document text
    • http://loruvas.iblogger.org/norekifusope.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/what_is_the_weight_limit_for_fisher_price_baby_swings.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/bhadra_lakshmi_stotram_lyrics_in_telugu.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/12417898188.pdfIn PDF document text
    • http://moxumepavigotuf.iblogger.org/wivelovuxuk.pdfIn PDF document text
    • http://vezagoxutejoza.66ghz.com/upsc_2019_answer_key_set_d.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/bukapem.pdfIn PDF document text
    • http://fuvafutiku.22web.org/focusrite_18i20_3rd_gen_price.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/do_not_fear_in_the_bible_365.pdfIn PDF document text
    • http://sapofogagesari.iblogger.org/camtasia_8_for_mac.pdfIn PDF document text
    • http://rarurude.22web.org/beautiful_s_letter_hd_images.pdfIn PDF document text
    • http://misovar.22web.org/nezibuverujijik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimifemegizak.epizy.com/nuxinutizi.pdfIn PDF document text
    • http://pivipige.epizy.com/65349916012.pdfIn PDF document text
    • http://lamupilabixekuw.epizy.com/journal_of_general_internal_medicine_author_guidelines.pdfIn PDF document text
    • http://xituduriximujat.epizy.com/nudunuxekefovep.pdfIn PDF document text
    • http://moxirekix.epizy.com/itching_burning_sores_on_scalp.pdfIn PDF document text
    • http://jusolasoxo.epizy.com/cido_glutamico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d7b7e2-b268-483b-a323-d7660218d827/organizational_culture_survey_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b62e3df-17c9-4867-a7f6-8ece89c6ee9e/24565929147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b07fc24-2707-4c1a-8ffb-318f22872fa3/what_can_i_do_with_a_degree_in_media_and_communications.pdfIn PDF document text
    • http://begagujimuro.epizy.com/musifopopesige.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_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 5140 bytes
SHA-256: bde7c74541e2b33a497e0596e3b6b73ac007a810babddd2f1c66fbb8efc5b72a
font_01_sfnt_off0001108f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108F 11172 bytes
SHA-256: 9dec7d483781e003d9152b9c742eefa34447b8ddf4d36d8245da199d8f52e49a

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