Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fda388eb5854f2…

MALICIOUS

PDF

83.8 KB Created: 2021-03-17 04:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0df504e4276cf2556df1187e89897a9c SHA-1: 14707b8dde68d89bea559d538e220c2e9a4463cc SHA-256: 92fda388eb5854f212154ba2ce8957ec317baeb62b38027c9861f130e3bc93e9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or malware distribution. The embedded URL 'https://seumenha.ru/strik?utm_term=who+governs+the+affordable+care+act+is+true' is likely the primary lure, directing users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/strik?utm_term=who+governs+the+affordable+care+act+is+true PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475577/normal_6030112c7588b.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/how_to_remove_uppababy_bassinet_canopy_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_600dbfef4f630.pdfIn PDF document text
    • http://online-bestshop.xyz/93002283468cwlgp.pdfIn PDF document text
    • http://eagleaff.com/waiver_and_assumption_of_risk_template14ilz.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ijbhha8/barbee_s_freeway_ford_denver_colorado.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/83002322876.pdfIn PDF document text
    • http://wagajij.22web.org/86373864633.pdfIn PDF document text
    • https://zenovoruzunej.weebly.com/uploads/1/3/4/3/134339910/4122790.pdfIn PDF document text
    • http://plafond.xyz/392960452290mh5i.pdfIn PDF document text
    • http://lizubujakus.22web.org/antepartum_haemorrhage_green-_top_guideline_no._63.pdfIn PDF document text
    • http://return-0.com/tejasovatidawetalakegfehp4.pdfIn PDF document text
    • https://nilelaji.weebly.com/uploads/1/3/0/7/130775665/wezusiditibowid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5fe5fc1f1ad1a.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/igzTTDt/fairy_tale_high_donna_summer.pdfIn PDF document text
    • http://mx50off.info/lista_de_verbos_irregulares_en_ingles_para_imprimirl03x2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471106/normal_5ffa08f9c3258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujuguj.epizy.com/dictionary_of_language_teaching_and_applied_linguistics_1992.pdfIn PDF document text
    • http://bepofitome.rf.gd/coronary_artery_disease_ppt_template.pdfIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/63530499085.pdfIn PDF document text
    • http://tikimiwuwal.myartsonline.com/how_to_install_zoom_on_mac_catalina.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/autism_spectrum_quotient_scoring.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/socso_caruman_2020.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_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 5496 bytes
SHA-256: 1449fcc2ff1b49cf85f9056571cd8da48ae4aa7bad407483a92c19abff302647
font_01_sfnt_off00011ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 11400 bytes
SHA-256: 798fb02226b39fa2137eb0d5c9f4218897779fc507a2bcb989d0e7976d2d50e7

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