Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b47647bba94613d…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 02:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cb9a389d738e1902c6a416368692a343 SHA-1: 59f1d3b44709aa746fdee5294ce7575d04d8c5f1 SHA-256: 8b47647bba94613d44701bb6724be611ec99a7b432e450b0aa560c8bf6e2b7e4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=agroforestry+systems+pdf PDF link annotation
    • https://cdn.sqhk.co/navimoxa/hfViaYu/23079766834.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/hddvTEt/jebolepelomukijul.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/W6ilheo/17272214616.pdfIn PDF document text
    • http://tiwikif.22web.org/4152769902.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/Qjj5giL/dewoziperelotokiw.pdfIn PDF document text
    • https://terovudomam.weebly.com/uploads/1/3/1/4/131406893/5398482.pdfIn PDF document text
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/jibavexug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79041750-f8cd-4e5a-a83b-7e57af87c6bc/18299525631.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/haryana_yamunanagar_today_weather_report.pdfIn PDF document text
    • http://jowelipap.epizy.com/basesupilazobugefexesiw.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/ferrari_f40_for_sale_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/code_talker_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/tecarta_niv_bible_5._1_apk.pdfIn PDF document text
    • http://zadobimad.epizy.com/what_questions_will_i_be_asked_in_a_warehouse_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4216d9b1-77ac-46b4-9e78-a87323c978fc/how_much_does_planet_fitness_charge_a_month.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/kifaxitaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/xoranu.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/72779738577.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/nimononobedavemeden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f52deb-432f-4b1e-9c16-d11e65306cab/back_to_eden_gardening_method.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/company_of_heroes_trainer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287251d4-e87b-442a-9038-a4d96cffa0bf/26294874963.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_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 5212 bytes
SHA-256: ae344269a389b24d638710a5d88955afecdc4ef4e8b60ea3272cd1a06696d403
font_01_sfnt_off00010eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB0 10644 bytes
SHA-256: 265ed60a7be6d1c74c47c9ccd12e5536d1ec0c283e91c8e216daed6facff32b8

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