Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dbae3d7d93969f…

MALICIOUS

PDF

90.6 KB Created: 2021-03-20 12:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 42bfe9673dade96d6ff4d9e29653a783 SHA-1: 6d467efbe3c5794ddf2bf337ba892a952a91b0f8 SHA-256: d7dbae3d7d93969f058e76c173eb97557469ba97e32e167a8c04eb7bf8264bae
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent external URI, 'https://vilenefex.ru/strik?utm_term=j+alfred+prufrock+poem', is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=j+alfred+prufrock+poem PDF link annotation
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/jawuduxipaxefeg.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/5b71c97.pdfIn PDF document text
    • https://xojurumute.weebly.com/uploads/1/3/5/3/135328527/wijidifademijiruto.pdfIn PDF document text
    • http://ig-copyrightviolation.com/formato_matriz_de_riesgos_gtc_45_2012_excelrh8j2.pdfIn PDF document text
    • https://tupunatuluzike.weebly.com/uploads/1/3/1/3/131383671/28436e90e7f84db.pdfIn PDF document text
    • http://puwinowelin.medianewsonline.com/tibaluwaligekab.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/basic_english_learning_app_free_download.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/bokovusupunuvap_najiwezep_vexetala_gifonu.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/kiduvilasen_mapodeba_gugujavu.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/ruxupomuzolo.pdfIn PDF document text
    • https://doboxupa.weebly.com/uploads/1/3/5/4/135401174/879ed1e6213.pdfIn PDF document text
    • http://mx50off.pro/sirefogotftn7.pdfIn PDF document text
    • http://znasila.ru/gta_5_cheats_xbox_360e7r50.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/5934719403.pdfIn PDF document text
    • https://berizezemimuto.weebly.com/uploads/1/3/2/6/132695806/muwusazobarem.pdfIn PDF document text
    • http://znatural.space/power_plant_technology_m.m._el-wakil_solution_manualefrbb.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/nemoveto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/duzigekekuboloset.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/bangladesh_government_holiday_calendar_2019_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/7551010961.pdfIn PDF document text
    • http://vawofirulev.myartsonline.com/metabolismo_humano.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/milk_bottle_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/sijel.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/audiometria_verbal.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/schubert_impromptu_no_2_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/widumujejetolapapu.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_off0001246b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246B 5176 bytes
SHA-256: e13f5b8b63467baa84cc5122127c04a61e529504aa2c16723dd4a98301c9bede
font_01_sfnt_off000135fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FB 11276 bytes
SHA-256: a0fe1e5990c12599311038cfea0348e9af9bc6aa64558f1cdd0a33d2a223d79a

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