Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6362025f012a7e…

MALICIOUS

PDF

79.6 KB Created: 2021-05-14 05:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 23731634581dce64ad2a066440a9b4af SHA-1: ce2243183dfe4942022565c95ff3e12d77a744ac SHA-256: 7a6362025f012a7e9d253ca576dc61eebf43bd64cc74bef5b0f65d89863aa7b1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to disguise malicious links.

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://xezojetit.ru/strik?utm_term=easy+steps+to+draw+anime+girl+face PDF link annotation
    • http://leadtop.co/55566338708hht6x.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/jgigiMM/car_sale_agreement_template_ontario.pdfIn PDF document text
    • http://speak4pro.com/23523390142pcfyv.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/15330604740.pdfIn PDF document text
    • https://cdn.sqhk.co/zarudaletok/hniieCI/2193908143.pdfIn PDF document text
    • http://ijmalan.xyz/diagnostic_assessment_in_education5hpux.pdfIn PDF document text
    • http://raifaisentgo.online/903526120017h32o.pdfIn PDF document text
    • http://fortuneo.biz/macbeth_quotes_testwvkyo.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/how_to_go_about_build_your_own_house_uk.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/omega_juicer_mm900hds_uk.pdfIn PDF document text
    • http://masito.space/nuxixozigudoxekanawuwapea2h0z.pdfIn PDF document text
    • http://subonus.ru/1646138268w6kpq.pdfIn PDF document text
    • http://xeriruburubigav.22web.org/complete_ielts_bands_6._5_7._5_student_s_book.pdfIn PDF document text
    • http://mukisugogo.22web.org/ganolijurusi.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/asphalt_7_apk_obb_filermzph.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/90Zijjd/2515497236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://watekiz.rf.gd/myles_munroe_teaching_on_purpose.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_6f501cc730ed4876a9c864e0d1baba2a.pdf?index=trueIn PDF document text
    • http://remurojax.rf.gd/kijuwowunifudatenidub.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_6154972fdff847a28d6ad7d3563fe81b.pdf?index=trueIn PDF document text
    • http://lufafutogixafu.rf.gd/i2_analyst_notebook_9_user_guide.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_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 5628 bytes
SHA-256: b215b488e2e3906bffb5fe1135e9a19edf1448e0da5b97c7ea573ffeff454010
font_01_sfnt_off00010c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 10804 bytes
SHA-256: 0ebbdf084d35d46e97bea9a41f8900acbd6eb7b8607a517175c78109c564c861

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