Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0393a8c3205161c…

MALICIOUS

PDF

110.5 KB Created: 2021-04-08 07:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f06de306a1a8b2c3718036641022206b SHA-1: c61b5697c9d43b9567d317447553509aaac18524 SHA-256: b0393a8c3205161c2b75785eb07ecf4b757fd40a51b11cf3c653b402c6ad7bd4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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.
  • 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=do+inbred+dogs+have+problems PDF link annotation
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/butigujobeze.pdfIn PDF document text
    • http://bojidodug.iblogger.org/abide_with_me_hymn.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/somali_amharic_dictionary.pdfIn PDF document text
    • https://vexinafofonazes.weebly.com/uploads/1/3/1/8/131871992/vetifefokariku.pdfIn PDF document text
    • http://tesodip.iblogger.org/27005676799.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/nupisut.pdfIn PDF document text
    • https://gutusalewizewuj.weebly.com/uploads/1/3/1/8/131871657/risoju.pdfIn PDF document text
    • https://zedimidobigeno.weebly.com/uploads/1/3/4/7/134721933/lisinuri.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/office_administrator_roles_and_responsibilities.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujijetani.epizy.com/verbos_irregulares_en_ingles_y_espaol_presente_y_pasado.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_33fd525f29d94856ae7fbadb2edeb35e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/40539125187.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_5b5c3421bd78401aaf3326251a2d7fb3.pdf?index=trueIn PDF document text
    • http://watifisur.rf.gd/wokasolenajerobivokatada.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_66d7f8d072364fcabc59e3444e7d5ed7.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_920865da361545d38361e697d8667ad4.pdf?index=trueIn PDF document text
    • http://nakewifowid.rf.gd/87953499533.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_ea93fb0645274ab9b6b5dd9bcb3368ba.pdf?index=trueIn PDF document text
    • http://posopexal.epizy.com/best_selling_self_help_books_2020.pdfIn PDF document text
    • http://nibinelageniwir.epizy.com/85038804691.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/66957846238.pdfIn PDF document text
    • http://kajevonuma.epizy.com/16279170246.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/lugoluzelovadatipemamuli.pdfIn PDF document text
    • http://bawatusarab.epizy.com/android_native_smart_app_banner.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/ateneo_de_davao_uniform.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/definition_of_urban_development.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/widit.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_off000173f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F3 5572 bytes
SHA-256: 277f0af31c1f7120f4d3969b95abc402b98b0736fcb4ba46a15decca4ee6281d
font_01_sfnt_off000186c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186C0 10984 bytes
SHA-256: c6361159f7f7fb703ab99c939ddc6952fdab589989be08db359973438b7d724c

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