Malicious PDF — malware analysis report

Static analysis result for SHA-256 156a48bab9aaa0ab…

MALICIOUS

PDF

73.8 KB Created: 2021-03-01 09:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 90c13851012869c634db8819c32fc04a SHA-1: d163ca605e76f1ad65e2bdc49af7c58618d84f9e SHA-256: 156a48bab9aaa0ab1eb88389694036be99da017e7513f2e944046a3ffd4f22f8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=3rd+book+in+percy+jackson+series PDF link annotation
    • http://apkweb.net/nigokedidaxugogixezenuev7i.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/kidaziliwobedi-muredit-ratenufoxa-kemop.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/how_to_install_fios_backup_battery.pdfIn PDF document text
    • http://italysummer.space/the_sorceress_the_secrets_of_the_immortal_nicholas_flamelt97zg.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/cmo_cambiar_el_ttulo_de_propiedad_de_una_casa.pdfIn PDF document text
    • https://rudunusom.weebly.com/uploads/1/3/4/6/134602981/senipubevobugiw-romeji.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/mizekeninakorejaxolud.pdfIn PDF document text
    • http://pozufopajosel.mypressonline.com/benowewufu.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/65471766000.pdfIn PDF document text
    • https://fenulibamale.weebly.com/uploads/1/3/4/6/134601409/navajuxibepapovemi.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/macos_catalina_developer_beta_access_utility.pdfIn PDF document text
    • http://philonio.online/view_all_journal_entries_in_quickbooks_online9h1gh.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/bakoloj/sunurodebolagizatowemosu.pdfIn PDF document text
    • http://jofegatedil.rf.gd/answer_back_feature_mazda.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/arcade_cabinet_plans.pdfIn PDF document text
    • http://tepokubomime.rf.gd/king_lear_act_5_scene_1_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/astrill_for_macbook_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/pearson_ap_biology_review_book.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/13452302928.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/31788888007.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_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 5488 bytes
SHA-256: 820fc9af4e1c25f9069621038a12461367639579e4052b4095255de39197c127
font_01_sfnt_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 10516 bytes
SHA-256: 7cfb06340dd8f59da258767c7cca30da4be17bf8dbd7ccd9d36b6e6e5cd515a1

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