Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee3e37159a6a6b0…

MALICIOUS

PDF

94.0 KB Created: 2021-04-09 21:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9db436b1ca3e911513f96aa1232bbb0a SHA-1: 4c9a7bb8e1e38482d02f59f2003e0cbe45b1593d SHA-256: eee3e37159a6a6b08e20abd0cb43fe542b09dd2c45bf5b3f95c346c2b5b480d0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=arm%2527s+reach+co+sleeper+bassinet+weight+limit PDF link annotation
    • http://pupunorip.getenjoyment.net/28597065627.pdfIn PDF document text
    • http://nncucuucuc.space/auxiliar_de_tecnologia_da_informao_salarioq9fqq.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/atlas_gii_phu_ngi_6.pdfIn PDF document text
    • http://wavarev.22web.org/telupada.pdfIn PDF document text
    • http://vash-fasad.live/los_caballeros_las_prefieren_brutas_online_gratish6k8e.pdfIn PDF document text
    • http://nat-fru.space/gutuklbpke.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/tisazukenodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizenusogusu.atwebpages.com/66336561797.pdfIn PDF document text
    • https://db6a684c-bd73-4a61-997a-17040cc1d896.filesusr.com/ugd/bbbb20_302f180300a141748bcb50270363b0f5.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_ea57cdc601a74cbe93c85fa8eb38d8fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/jejupej.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/lizasafakogo.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/95227205196.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/church_administration_and_management.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/zajunitonu.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/everbilt_hinge_installation_template_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/free_independent_contractor_agreement_template_nz.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_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 5604 bytes
SHA-256: b1027869cdfdd5d19cc0846f36f610fa4ef933e1a19fa5eaba7ecbe5a4c39b30
font_01_sfnt_off00014022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 13088 bytes
SHA-256: dba847dcf1d069cc46e3681b87f21f3eaac3894bbebfabc8fa6a3255255ea0fa

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