Malicious PDF — malware analysis report

Static analysis result for SHA-256 180d59820d5eb65d…

MALICIOUS

PDF

84.0 KB Created: 2021-03-15 17:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 29b52922bee7ac7ac7198b7c5d640f3f SHA-1: bfacc18a8d6dc85405ea0f3b9cc2af2f890eace1 SHA-256: 180d59820d5eb65de7d6c14002647ffed9e286aeae12e698bb103988869f9c8a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=best+browser+for+flash+games+2018 PDF link annotation
    • http://helpcreditscore.info/rt-ac55uhp_default_passwordigkdp.pdfIn PDF document text
    • http://koreanluxe.com/una_vida_robadaix35x.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/wujupavulofizikazenovuze6cw61.pdfIn PDF document text
    • http://italylife.pro/252345211773j598.pdfIn PDF document text
    • http://silvanozito.online/15860647808fck70.pdfIn PDF document text
    • http://myfirstsite.xyz/mantak_chia_techniquesxigss.pdfIn PDF document text
    • http://zemevabe.22web.org/64699768815.pdfIn PDF document text
    • http://zepawagir.iblogger.org/online_music_library_project_report.pdfIn PDF document text
    • http://bristol-yalta.run/mississippi_burning_questions_and_answersy915m.pdfIn PDF document text
    • http://filfex.ru/23953369554ttb55.pdfIn PDF document text
    • http://teplotronic.ru/aws_codedeploy_cloudformation_template5n5qo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_5d68f21d80ab46e682713f8a18613d04.pdf?index=trueIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_6b182a7506714b1e8049148d05e825e2.pdf?index=trueIn PDF document text
    • http://wilopomuba.epizy.com/totupomasejatijuxofelij.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_e3cef00f7c8f4e49aeaa236306f5ce39.pdf?index=trueIn PDF document text
    • http://maguzuj.rf.gd/64458149411.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_ec15d9e903d54b6e9cdc0657382212aa.pdf?index=trueIn PDF document text
    • http://zufagubiles.epizy.com/lake_glenville_fishing_report.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_47aea315c70548438cab15b90c307eec.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_3dc59de53e6944a68ecdd0c7feeafc97.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_7a2f82fbaab44697914cdaddef4bb917.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_1ffd938d96dc4f2382a303141d315bb7.pdf?index=trueIn 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_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 5984 bytes
SHA-256: 1d16af43ca0803839aa86f13c20716e4d49931e906139d0c6144abd8cc6a66f3
font_01_sfnt_off00011d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D73 10304 bytes
SHA-256: 8329d7a62722a86e9b70743191c9565d7c454a3742b87816f661e9ed2b455d4e