Malicious PDF — malware analysis report

Static analysis result for SHA-256 4952a15faf0893c0…

MALICIOUS

PDF

65.9 KB Created: 2021-02-05 06:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 09a2915ca04238ffdb0f04c673eb49a4 SHA-1: 2a965499f8c862867cd0aba7d4cea486d8d76c4b SHA-256: 4952a15faf0893c0e7ba05af83cf41f60e561647ddff7b0d7b0551c7b24007d1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly to seumenha.ru, suggests an attempt to redirect users to malicious sites. ClamAV also detected it as Pdf.Phishing.Trojan, reinforcing the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=aed+pads+full+form PDF link annotation
    • https://wafukereloxajof.weebly.com/uploads/1/3/5/3/135311523/melemamolag.pdfIn PDF document text
    • http://wofeboz.66ghz.com/jugezozevokebasemag.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/junuvor_lovuwezodamikuw.pdfIn PDF document text
    • http://excschool.ru/brunner_and_suddarth_14th_edition_study_guide8f6ee.pdfIn PDF document text
    • https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/xebupevumo.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/wizowirarig-zewalawen-busobumejegin-finup.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/mubefula/cambiar_de_a_word_gratuito.pdfIn PDF document text
    • http://tumoxotakim.epizy.com/angry_birds_rio_game_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/auxiliary_verb_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/11123701457.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/lipadewodarasabuzise.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/ladies_hybrid_bike_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/29741748261.pdfIn PDF document text
    • http://wedizakur.epizy.com/xiliwisilejixorawajitil.pdfIn PDF document text
    • http://ximedamolaxeve.epizy.com/autocracy_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/aggressive_angiomyxoma_a_rare_case_report.pdfIn PDF document text
    • http://dalefiza.rf.gd/standard_multiple_regression_table_apa_format.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 5176 bytes
SHA-256: aa21b4bb1d2f2e676cb6e03bf6f9b8708baf9f71b0da1d6d7715c4092184144e
font_01_sfnt_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 9804 bytes
SHA-256: b89ffe310d9e362c2d6e1dab85bc299a60e504bc3645841e7c00a3a9cb8035a4

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