Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaca1feb4c4d1d4…

MALICIOUS

PDF

76.2 KB Created: 2021-06-06 03:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb2348ceec00139afd767bea89c2145e SHA-1: bab2cf06acdddeaff71f0bef7ea1bf9a94be8e50 SHA-256: 3eaca1feb4c4d1d425c6c96c27e34e45ecff7b04b5262175bff0e6ce6e8197e8
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF structure itself are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/123?utm_term=joomla+3.+7+templates+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489596/normal_605c6bdd19f30.pdfIn PDF document text
    • https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/nibiwatilexemizibase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6062eb60b7fd9.pdfIn PDF document text
    • https://gowexafej.weebly.com/uploads/1/3/4/6/134621848/863992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_60461b9b3a425.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/sutepi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416940/normal_6001cc8e19d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_602df7c9ce5c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kunixove.pbworks.com/f/rubiks_cube_formula_3x3_telugu.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144452442/buxevilukefadokonogojar.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144516849/which_of_the_following_is_included_in_project_charter.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/f/how_to_set_up_my_echo_dot_3rd_generation.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/w/file/fetch/144637227/16276798019.pdfIn PDF document text
    • http://josinibugaju.pbworks.com/w/file/fetch/144693783/gudegibosurixota.pdfIn PDF document text
    • http://mujusevo.pbworks.com/w/file/fetch/144683313/english_movies_telegram_links.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144427197/5359460800.pdfIn PDF document text
    • http://fuxotatizexu.pbworks.com/f/59762020241.pdfIn PDF document text
    • http://gaguseka.pbworks.com/w/file/fetch/144642930/17230343041.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144451188/17466153555.pdfIn PDF document text
    • http://betifufato.pbworks.com/f/how_to_write_meeting_invite.pdfIn PDF document text
    • http://pojaweku.pbworks.com/f/rigakelinobitumugedexiguk.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144470394/oceanography_an_invitation_to_marine_science_9th_edition_free_download.pdfIn PDF document text
    • http://luwosotatex.pbworks.com/w/file/fetch/144680436/openshot_video_editor_tutorial_in_hindi.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144510657/how_to_write_a_literature_review_example.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_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 5312 bytes
SHA-256: 1cb25b0a026bff5350fcaed2202c4cecff9ab49178248b31d97d76fddcc891de
font_01_sfnt_off0000fed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED2 10744 bytes
SHA-256: 436caa03368cf621b7809b27ecfe969977e30e982f29e5efbe3603e1f786ac81

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