Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b23f9c7f95b094…

MALICIOUS

PDF

86.0 KB Created: 2021-03-23 08:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 42e1fb175297f71015d38ea458b08f0e SHA-1: 6a602e4786a9e1e3dc633df420feed1cdf7601cd SHA-256: 02b23f9c7f95b0947f77e09fd3522cec59550c91437e56cbf32c5f7b16bbc29a
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards an attempt to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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=is+peavey+a+good+amp+brand PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/char-broil_patio_bistro_electric_grill_with_tru-infrared_cooking_system.pdfIn PDF document text
    • http://rowewuxeg.getenjoyment.net/gerepikekudub.pdfIn PDF document text
    • http://discount50it.pro/wukemojamameborudewa1o8t8.pdfIn PDF document text
    • http://sarixibi.iblogger.org/stock_market_basics.pdfIn PDF document text
    • http://leduxebawini.22web.org/marathi_calendar_december_2018.pdfIn PDF document text
    • http://fringigejy.site/kufupikolake7owpv.pdfIn PDF document text
    • http://boldly-grow.com/fawogovisubupuwitosemitil9ih81.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/pebodikawip.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/livro_capitalismo_socialismo_e_democracia.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/sasufufa/jixijuzatajesajupo.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_52e4699fc20e40e796829dafe187c268.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/88644043556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d49d1a-7d67-4636-b72d-26a810c4982b/la_doctrina_monroe_y_el_destino_manifiesto_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/alcatel_lucent_8038_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52854dd3-66ac-4f0e-a2ec-9a009545d64a/zewitasuwemazijapinu.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_c671df81b6e6424b9c3a75bfc6686b79.pdf?index=trueIn PDF document text
    • http://girakes.rf.gd/find_exterior_angle_of_regular_polygon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40234af1-28d5-4848-b112-652ab3283f30/what_is_the_theme_of_on_the_sidewalk_bleeding_by_evan_hunter.pdfIn PDF document text
    • http://sawozepanoludib.rf.gd/sofepixidan.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_79ac4b881a0d4c6bb7ce4acb7d57fd06.pdf?index=trueIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_4ec8d8e9d50d4609bdc804cd8e4e4893.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9f5e4c-a6c6-4ddd-ab3d-18cd45113a87/how_much_oil_does_a_2002_ford_explorer_take.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/wuwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199ad7a2-ac27-4207-baca-216b01267357/oracle_database_client_software_requirements.pdfIn PDF document text
    • http://woniladorunuf.epizy.com/45312665573.pdfIn PDF document text
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_1d259177ccf0461bb4f0c9b261613b0d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/msi_a68hm-e33_v2_a68h_fm2_matx_motherboard.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_off000111d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D9 5488 bytes
SHA-256: b2bec200d36d62f397357917ac543d87a581a9e3ac09078b46084042516ec01d
font_01_sfnt_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 10980 bytes
SHA-256: 7c3b9411faeda82559b72a9de3834042e86ed10dfa79508a2cf261ab4004b599