Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad20fec8b699ff4…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 01:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8d3042a43654a2c25ab518eea3ce81b9 SHA-1: f3c64a5ac0172a5eb4de007b1a349b6a4c02bf52 SHA-256: 6ad20fec8b699ff40669f8830fd07817a2a367686393405a45b702d9896de5d0
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to direct the user to a potentially harmful site. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document designed to lead users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=carl+rogers+unconditional+positive+regard+definition PDF link annotation
    • http://gejejok.iblogger.org/large_format_film_cameras_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fce52690d6fa.pdfIn PDF document text
    • http://ranebixulukaku.iblogger.org/how_to_reset_my_thermostat_luxpro.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/vuwerisoremunepi.pdfIn PDF document text
    • http://kifikawi.66ghz.com/gofasaxilifufamalikem.pdfIn PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/woruzikes.pdfIn PDF document text
    • http://kisedevobale.22web.org/what_is_a_borderline_mother_like.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_6017269a0c8c1.pdfIn PDF document text
    • http://dapisamifo.22web.org/cgi_animation_tutorial.pdfIn PDF document text
    • https://tusefekojeseto.weebly.com/uploads/1/3/4/4/134437698/55b69f299fc53.pdfIn PDF document text
    • http://lijovafe.22web.org/free_purple_wedding_invitation_templates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_605953dbe86b0.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/d54e3258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_6030449aef5cc.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/tuwiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuluvegutadetu.epizy.com/41917777420.pdfIn PDF document text
    • http://lojizigakuxit.epizy.com/age_of_empires_2_google_drive.pdfIn PDF document text
    • http://dutugege.epizy.com/14637451437.pdfIn PDF document text
    • http://vukabufe.epizy.com/34035006268.pdfIn PDF document text
    • http://dipimov.epizy.com/ielts_academic_writing_task_2_with_answers.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/nitrome_skywire_vip_answers.pdfIn PDF document text
    • http://saweridam.epizy.com/94567529797.pdfIn PDF document text
    • http://guduzazuki.epizy.com/blumenfeld_gambit.pdfIn PDF document text
    • http://muzowagujojate.rf.gd/77811768990.pdfIn PDF document text
    • http://vomigok.rf.gd/veera_abhimanyu_telugu_movie_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_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 5288 bytes
SHA-256: a836a256cceecd56fcdc0d35d1118d819b0729bfb7c5bf4043747edf0fbef076
font_01_sfnt_off00010917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10917 10664 bytes
SHA-256: b763a9d7e8e736e32ef498d05f67ca9cfe46c102dd45e992dea2358884f9f5ca

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