Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae334de3ca7fd2ef…

MALICIOUS

PDF

80.7 KB Created: 2021-03-08 00:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0df03473413bc60ab2f8a67995819b91 SHA-1: 9a21329874819016ede10f823ec449e05303cb37 SHA-256: ae334de3ca7fd2ef64ccfda1ccf47e944e773915a53ea54a5df1b121bf728c4b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, 'gimoguvi.ru', which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=eat+right+for+your+blood+type+a+cookbook PDF link annotation
    • http://sujuwufuki.iblogger.org/laposomarifomonurizame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389793/normal_6033277e1b5b8.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/oracle_database_11g_architecture_interview_questions_and_answers.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/what_is_the_difference_between_touch_free_and_soft_touch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_600a6bf427bd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fe331d258218.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/how_does_third_person_point_of_view_affect_the_reader.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/50421715988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472763/normal_6008e62fc4d08.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/fanikamomisolodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/dress_code_formal_vs_black_tie.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/39621244480.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/lagu_aye_123_mayeska_metrolagu.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/xewajurufamigodumoviba.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/carruagens_de_fogo_musica.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/anarchy_in_the_ukulele.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/jidoxopepojodu.pdfIn PDF document text
    • http://silegig.epizy.com/how_to_workout_at_home_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/hd_wallpapers_for_laptop_desktop_free.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_off0000fe44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 5504 bytes
SHA-256: 05f0c7e92028695901356417968d234c9266c2d6c3bc7d5c79427ee417a1fa04
font_01_sfnt_off00011103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11103 10520 bytes
SHA-256: cb18274ed112cf4786649e3914bc84a562612e09dbf52a1fcfd9ca625b8518f0

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