Malicious PDF — malware analysis report

Static analysis result for SHA-256 3045f63642f9b53a…

MALICIOUS

PDF

78.3 KB Created: 2021-05-04 02:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7ea740a584da36e2f5677b4d58e8f0c SHA-1: 16251d6ea1daf75948a6fc2a8fe5966cbf7468f9 SHA-256: 3045f63642f9b53a2bf12c7a737437b62e19ff769163c80b73e798e3472c62d0
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 0.9991

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://jacksth.ru/strik?utm_term=medicare+benefit+policy+manual+chapter+1+%25C2%25A730+and+chapter+16+%25C2%25A7100 PDF link annotation
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/biraxenowad-gowupekerit-walipoviruji-maribexojilir.pdfIn PDF document text
    • http://businesshelpservice.com/79150689559k833m.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/286735668668944.pdfIn PDF document text
    • http://bit7.top/basic_sewing_patterns_bookcudod.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/49709424542.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/alcoholes_quimica_organica.pdfIn PDF document text
    • http://drnextact.xyz/african_holistic_health_free_downloadnkqou.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/dVcSzkD/petrolia_restaurants_canada.pdfIn PDF document text
    • https://vejupurujiku.weebly.com/uploads/1/3/1/6/131606174/litewuduxujudu_jajosotikivolim.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/hhEfCjj/halloween_movies_in_order.pdfIn PDF document text
    • https://cdn.sqhk.co/pajubopolak/a5jjJii/pac-_man_and_the_ghostly_adventures_characters.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/55394934805.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/gdL5if6/49386530565.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/ilhd9hg/4533315763.pdfIn PDF document text
    • http://opendouche.xyz/gekalabiroh7dl0.pdfIn PDF document text
    • http://kind-insta.site/ejemplos_de_reacciones_quimicas_de_combustion_formulawyn8o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://narajogevimoxe.epizy.com/bootstrap_login_templates_examples.pdfIn PDF document text
    • http://lokemuwebofeg.rf.gd/girlfriends_guide_to_divorce_season_finale.pdfIn PDF document text
    • http://zefefudu.rf.gd/xoretogabuvazekowo.pdfIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_2bb4d58e17654d5f81dd36eb798536d5.pdf?index=trueIn PDF document text
    • http://tenurusimuxu.epizy.com/manual_energias_renovables.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/99416378778.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/breast_cancer_therapy.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_c389ea2007644ffb8a8dd40e35c5b901.pdf?index=trueIn PDF document text
    • http://togipabuwaf.epizy.com/kedudilomipu.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 6240 bytes
SHA-256: 822bd9e0601c579da390865ff1f87d136979feb5a02966829089351d55f46f92
font_01_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 11148 bytes
SHA-256: 794e1ec4e089db0476c51eb350f472bd8737be0916f5a33ef204bd73b5a8485f

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