Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcd6e32f560162e…

MALICIOUS

PDF

72.9 KB Created: 2021-04-04 03:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d6ffabe5cccc4c69293ee9b8e94e616e SHA-1: d024f5d753d91df14ba57020085c616486bdab66 SHA-256: 2bcd6e32f560162ea0066d64b69e4293676a09eebeb0fa4239b2b54530c1ed7f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'how to clean kenmore elite dryer', likely a lure to disguise the malicious intent of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/strik?utm_term=how+to+clean+kenmore+elite+dryer PDF link annotation
    • http://fkpravo.ru/nisasapifaxelelagifupemuba64az.pdfIn PDF document text
    • http://kino-vezde.ru/gavalebabopatiwoqbd54.pdfIn PDF document text
    • http://crysety.xyz/watijelupaobxq.pdfIn PDF document text
    • http://bonboxstudio.com/1n4007_datasheet_fairchilduecuf.pdfIn PDF document text
    • http://todayshop.website/resolver_ecuaciones_exponenciales_coqbrr7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_604ba38ac942b.pdfIn PDF document text
    • http://smartcoin.design/tuv_rheinland_iso_9001_logo_vectorvtu1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_60633b3984ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_6017f95a9c797.pdfIn PDF document text
    • http://shopeuro.pro/all_in_one_hdd_docking_875_drivers_windows_7zm2is.pdfIn PDF document text
    • http://dabiboniner.22web.org/8th_grade_social_studies_reading_comprehension_worksheets.pdfIn PDF document text
    • http://gayerkan.com/encyclopedia_brown_book_levelk634o.pdfIn PDF document text
    • http://xukebovuw.22web.org/campbell_ap_biology_9th_edition.pdfIn PDF document text
    • http://samettemiz.xyz/gupobisogekovopile1l24r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_600eedd5d966d.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/aortic_regurgitation_pathophysiology.pdfIn PDF document text
    • http://vseti.life/pro_typescriptkg7mx.pdfIn PDF document text
    • http://vibijinit.scienceontheweb.net/pubonasemusuzebuxexep.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/all_of_me_piano_sheet_easy.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/7fe7c303-6c63-44c8-b59a-57dec614ad47/tissot_touch_solar_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd99da6-32be-4e08-9ea1-df9f8edf028c/unidad_5_modelos_de_pronosticos_e_inventarios_investigacion_de_operaciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd3fec5-d022-47f5-b5ae-df84f48125c1/jomuvugupozorigopoba.pdfIn PDF document text
    • http://gadinupolujuker.epizy.com/thomas_calculus_matematik_1_trke.pdfIn PDF document text
    • http://midorevogexifaz.epizy.com/89274380431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2863610b-7b44-4653-af35-69b04315cb17/kefavixurorasukiritixogab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ed3eeb-5357-4bba-aca1-102c40be854b/nijunipirure.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_off0000e0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C7 5124 bytes
SHA-256: 2fcb3c24b4f12e1506c8499c64b393c001c00a24fb05e393f93b3a9ccae411b1
font_01_sfnt_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 10608 bytes
SHA-256: 0c2c9b0e8c44c1f7546be5e1cb34955a954c1238d7f3ae745328ec8217da9b5a