Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d19e646238bc263…

MALICIOUS

PDF

74.5 KB Created: 2021-03-11 15:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46868d93f051346ad982cd896b4be34a SHA-1: 90e4ea06e97ff5e1480ebe18e14585b30b12af0a SHA-256: 5d19e646238bc263e8bc954f38c37e58af157ef47f4dfdce11d47d45f56bf959
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/strik?utm_term=braun+coffee+machine+filter PDF link annotation
    • http://particuliers-societegenerale.xyz/amoeba_sisters_food_web_answerstqyid.pdfIn PDF document text
    • http://generatorsale.ru/80077456884wfv2h.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/eclipse_code_formatter_javascript.pdfIn PDF document text
    • http://konsalting.info/480533911777ons1.pdfIn PDF document text
    • http://avto-trokot.xyz/98704380106s1n4o.pdfIn PDF document text
    • http://tedesuvukifa.iblogger.org/how_to_apply_for_cfa_exam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nifopufu.epizy.com/94573575317.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_40d50c758e864b2680a4e01365434a5e.pdf?index=trueIn PDF document text
    • http://kojajopi.epizy.com/mewuxoxuxovafitinunozow.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/84757674131.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/analytical_method_validation_guidelines_fda.pdfIn PDF document text
    • http://letelexedat.epizy.com/mcgraw_hill_connect_instructor_guide.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_f48adefd449341bf81dd700c63db2dfe.pdf?index=trueIn PDF document text
    • http://zejagusip.rf.gd/machine_learning_salary_in_australia.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/zavagove.pdfIn PDF document text
    • http://wegepuzil.epizy.com/vejigantes_francisco_arrivi.pdfIn PDF document text
    • http://towupew.epizy.com/moulin_rouge_full_movie_free.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_bd16d3b6817746c29acc6870bb5ac5a3.pdf?index=trueIn PDF document text
    • http://nanisoz.epizy.com/96461705635.pdfIn PDF document text
    • http://pibimosozo.rf.gd/sifeboloxepawol.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_7a39bad8d35c4ab1bb96f1f97ac7f882.pdf?index=trueIn PDF document text
    • http://lagozim.rf.gd/92867237029.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 4876 bytes
SHA-256: 766fbd8945668be27e34b4b675422043f49e2e1d0ac30f41c138267af8205381
font_01_sfnt_off0000e8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 11112 bytes
SHA-256: f4f2fc277cc456d743ab42c38b4bea1b557b14dc7f1111f2c2a17e4c417515d7
font_02_sfnt_off00010e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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