Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5ca8e34fe91efd…

MALICIOUS

PDF

112.1 KB Created: 2021-02-08 15:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 72191ea966acc858e10d7399eca39223 SHA-1: dc2e9f01a18edf70cc72f2fdde360567f16ebb61 SHA-256: 2e5ca8e34fe91efd51c1059ec7cf75d021d456200ac067b65b4c8fb11b435bab
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to a construction business plan sample. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of external links suggests the PDF is designed to redirect users to malicious sites.

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://bologen.ru/wb?keyword=chip%20formation%20cancellous%20bone PDF link annotation
    • http://mp4.design/construction_business_plan_sample_pdijx1x.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/kosijonewunotu.pdfIn PDF document text
    • http://eagleaff.com/biology_questions_and_answers_for_class_9u81mh.pdfIn PDF document text
    • http://senteber.site/81759677105uilj7.pdfIn PDF document text
    • http://mebets.xyz/butipalipimutopupawitexujjtqmn.pdfIn PDF document text
    • http://slimerecipe.org/lunukodaturirafuwonezefenbq9be.pdfIn PDF document text
    • http://laura-egorova.ru/algebra_and_trigonometry_textbook_mcdougal_littell5pv6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5fdc5a16f0e98.pdfIn PDF document text
    • http://gayerkan.com/xunorezumobepilomojzzmj0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_5fda52e1489b5.pdfIn PDF document text
    • http://1offpark.xyz/10376917807ej1bn.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/wupuxus/geekbench_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/26238356760.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/systems_of_inequalities_word_problems_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/58329587225.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/black_friday_movie_free_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/characteristics_of_social_entrepreneurship.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_off0001799d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1799D 5300 bytes
SHA-256: 50544b82d5874c9492631296d5537b6fa09927e89e6c0d4e3bb102d03d0405fe
font_01_sfnt_off00018b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B71 12108 bytes
SHA-256: 50310e2a6329cbc9bab35a34c6600424471a66c0cbcdcc7810d8f38544b8f899

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