Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca722a24b341465e…

MALICIOUS

PDF

81.8 KB Created: 2021-02-07 06:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 474a753d004ec9977a8c76c4f3056fa3 SHA-1: 66da2c52ee75e3d4ee41e7436811f6a337da4fad SHA-256: ca722a24b341465ed528583bb69f3e4050ff8d15e3c57b82d6394054a82a962b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('maypoin.ru') that is likely used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed as a link farm, further supporting a malicious intent to redirect users to potentially harmful sites.

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://maypoin.ru/aws?utm_term=phong+nha+cave+without+guide PDF link annotation
    • http://floradoma.net/miami_airport_food_guidef3ini.pdfIn PDF document text
    • http://wukosuwusa.iblogger.org/canzoniere_ukulele_gratis.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/rigufotinesoxuwusupu.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/3149694.pdfIn PDF document text
    • http://gobigs.space/80278747700fyo56.pdfIn PDF document text
    • http://trokot-tonirovka.online/68531564408coztv.pdfIn PDF document text
    • http://wavolat.iblogger.org/sijapeduvoz.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://vatamutotomo.epizy.com/31977313567.pdfIn PDF document text
    • http://kelopemajidimux.epizy.com/benaam_movie_songs.pdfIn PDF document text
    • http://zopefunexot.epizy.com/bleacher_report_apkpure.pdfIn PDF document text
    • http://nanaxaj.rf.gd/platform_one_cafe_swindon_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/simple_electronics_projects_for_beginners.pdfIn PDF document text
    • http://ritarejameja.epizy.com/op_pohjola_group_central_cooperative_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/adapter_autocomplete_android.pdfIn PDF document text
    • http://durozebexonadop.rf.gd/42723864072.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/chaos_knight_datasheet.pdfIn PDF document text
    • http://ruvedinaz.rf.gd/social_media_marketing_action_plan_template.pdfIn PDF document text
    • http://xuzatazuji.epizy.com/silhouette_cameo_3_software.pdfIn PDF document text
    • http://kojajopi.epizy.com/adobe_sketch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/new_zealand_invoice_template_excel.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_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 4932 bytes
SHA-256: c87a1cfe7b8589d69ffb9d45f0b26fa933ddaf532fc1599617ab00daa8ab956f
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 12920 bytes
SHA-256: 04bd52da882a8372a34b2131dd9b92695eb76c9e8a2e26faddc4a5436b801ef7
font_02_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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