Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efa447efa5c435c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-24 05:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c01328c60461ba87d33da92b07cadb12 SHA-1: 94464d5ccf1bf7546a4a174409b914965c93c61e SHA-256: 5efa447efa5c435c9469869264f859d0dab2c6fb5edf13bb1d9c52a0252c835e
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 0.9993

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 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://resalured.ru/strik?utm_term=god+is+able+chords PDF link annotation
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/wimuvovegaja-moken-motixilozuwafo-balividoxiwoj.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/marathi_story_book_free_download.pdfIn PDF document text
    • http://lezirumari.sportsontheweb.net/wexanepipefam.pdfIn PDF document text
    • https://zaxanedipujez.weebly.com/uploads/1/3/4/5/134582154/miwer.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/8081603.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/23961867974.pdfIn PDF document text
    • https://bugagage.weebly.com/uploads/1/3/5/3/135330359/2ee01de523030.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/zonejilejekige.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/principles_of_business_information_systems_2020.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/kubani-takefozafuk-nutusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retiziwo.myartsonline.com/bisection_method_matlab_code.pdfIn PDF document text
    • http://zemikajinemoxi.rf.gd/7522461059.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/the_way_of_the_world_themes.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/nanugakeparamarulisumu.pdfIn PDF document text
    • http://fufibilola.epizy.com/93924498322.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/fexefedoliwoxumupufavu.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/what_are_extinction_and_spontaneous_recovery_in_classical_conditioning.pdfIn PDF document text
    • http://lugirike.epizy.com/dvla_sleep_apnoea_form.pdfIn PDF document text
    • http://logumowomupexi.rf.gd/capteur_de_temprature_lm35.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/tamil_nadu_obc_caste_list_in_tamil.pdfIn PDF document text
    • http://fejexojas.epizy.com/online_converter_to_excel_file.pdfIn PDF document text
    • http://segixiw.epizy.com/danone_annual_financial_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/benefits_of_meditation_worksheet.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_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 5200 bytes
SHA-256: 1944ced14ebcb014c5b37a5969de32854b2fa18bcbe3454bb237df618ae09d38
font_01_sfnt_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 9952 bytes
SHA-256: 24aa6d6db616c846585dee6380487c2f35c007ba48fb3fec13e7d7cd89ec03bf

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