Malicious PDF — malware analysis report

Static analysis result for SHA-256 0764316631af4568…

MALICIOUS

PDF

97.6 KB Created: 2021-05-02 06:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4c989e645b4ee90e66fadc8baf4297df SHA-1: 204f97b83fa32a33f7e52a48d2a48fee2c3b9454 SHA-256: 0764316631af4568cf7908695ac5257ff857dad9bc7a249957129b3e0779d8b5
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of an external URI pointing to 'xezojetit.ru' is a primary indicator of a malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=how+to+apply+monat+rejuveniqe+oil PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406789/normal_5fcb9abf0f02c.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/e7jahfv/ninunemi.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/UNxghjf/vejubinunuzisodoribasi.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/v02ibxL/castle_wars_armor_games.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/Sgejhii/ridusan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_602068d4b9e2f.pdfIn PDF document text
    • http://vazosuzited.22web.org/valentine_day_pic_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5ff7084de5ef2.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
    • http://dorediludopa.epizy.com/libibufuzotaf.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_026ddff13a4f457aa40a69886dd3b2db.pdf?index=trueIn PDF document text
    • http://wekijedi.epizy.com/gnomon_book.pdfIn PDF document text
    • http://xebinuv.rf.gd/pudarajora.pdfIn PDF document text
    • http://vopapatadape.epizy.com/fce_practice_tests_2_answer_key.pdfIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_e196722fb6ac4901914e5dde2723e8df.pdf?index=trueIn PDF document text
    • http://rifoxofome.rf.gd/safety_management_systems_in_aviation_stolzer.pdfIn PDF document text
    • http://fevukum.epizy.com/preparation_of_p_aminoazobenzene_from_aniline.pdfIn PDF document text
    • http://lexafuz.epizy.com/adverbs_of_frequency_exercises_a2.pdfIn PDF document text
    • http://loluwoje.epizy.com/pagapelunezajoxivoxemoruf.pdfIn PDF document text
    • http://xinirujoki.epizy.com/analise_sintatica.pdfIn PDF document text
    • http://sesugemedolaf.rf.gd/male_psychology_of_love.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_4065edb3ca234bdeb99d2827f03edc28.pdf?index=trueIn PDF document text
    • http://nuvopiruxi.epizy.com/38259013597.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_off00012eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEA 5084 bytes
SHA-256: 23f5f5eec945e426ade67a88b2a017520508dc0a496be5c2fa8c4d5ce6fd1353
font_01_sfnt_off00014035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14035 11868 bytes
SHA-256: 093232f83c2e49186e58acf46768793bf66b6501fee9f3522e98f5a2d941c170
font_02_sfnt_off000168c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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