Malicious PDF — malware analysis report

Static analysis result for SHA-256 786196fdae8df543…

MALICIOUS

PDF

74.9 KB Created: 2021-04-26 01:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d96c5d17d330019a4245af1aedd383f SHA-1: a914e11e1d688ae3367a6bf898218ecb153afff8 SHA-256: 786196fdae8df543d12b9c19ccfb5564a329e9256680949360be2b9dcffd7e7d
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 0.9996

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://baarspo.ru/strik?utm_term=define+warm+wishes PDF link annotation
    • https://ledegukumimajem.weebly.com/uploads/1/3/5/3/135393042/tidufufemoro.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/java_8_features_ultimate_guide.pdfIn PDF document text
    • http://naykaryadom.fun/chandigarh_police_constable_online_form9d9a9.pdfIn PDF document text
    • http://vipadminler.org/kunewaxowubugagkjsvw.pdfIn PDF document text
    • http://bio-ita.fun/what_foods_are_gluten_free_at_mcdonaldsgl252.pdfIn PDF document text
    • http://internet-babki.ru/departamento_de_alimentos_y_bebidas_de_un_hotelksx8p.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/budget_2020_in_marathi_free_download.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/5224373.pdfIn PDF document text
    • https://duxuxapuxud.weebly.com/uploads/1/3/5/3/135332588/3838167.pdfIn PDF document text
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/gevosufanuke-jimanagaluvimu-demeduwopowubop.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/9583866d5c.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/formas_de_comunicacion_interna_en_una_empresa.pdfIn PDF document text
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/20b6e16f9a8e89.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/kagedatabujo/when_to_use_because_and_due_to.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/partituras_de_canciones_en_piano_para_principiantes.pdfIn PDF document text
    • http://befadiw.rf.gd/58417967375.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/rexudopizajujur.pdfIn PDF document text
    • http://najorenowodume.epizy.com/boketexelusu.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/one_function_of_spreadsheet_software.pdfIn PDF document text
    • http://lojogonofar.rf.gd/integrated_chinese_workbook_simplified_characters_answers.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/reduction_of_adverb_clauses.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/67635058271.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_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5064 bytes
SHA-256: 7fb4a63f750cfa56793bd5a7ba5eb1a79d5717df7d63f1309a887c25e7053f5f
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 10504 bytes
SHA-256: bc194e60e874a2f796447f639a796bbc6979be58050d7577fdb40077c16233f9

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