Malicious PDF — malware analysis report

Static analysis result for SHA-256 830268f4f3168647…

MALICIOUS

PDF

76.4 KB Created: 2021-03-13 23:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3bd67626e77c07bb1c847b31d492fb05 SHA-1: 290f98953a588e800abb1b6b8ec24a4708ba2b0d SHA-256: 830268f4f31686478f9fdf054fb92d43fd6cc0e0a63cf17e586209d3713457e0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+smoke+a+roast+on+electric+smoker PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492275/normal_6001049f2f23b.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/february_forecast_for_portland_oregon5xgcf.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/WhaCm5G/42544159214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_600f40c0e1e75.pdfIn PDF document text
    • https://gixifufu.weebly.com/uploads/1/3/3/9/133999878/c7bc40aa64.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/cisco_4200_series_router.pdfIn PDF document text
    • https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/rokolerupux.pdfIn PDF document text
    • http://phtech.site/cad_drawing_software_free_onlined3ydz.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/xjdRigj/51671620540.pdfIn PDF document text
    • http://matras-24.ru/813161434074zu9k.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/xavitu.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/aHhavjm/precious_metal_price_forecast_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gi5Srha/solok.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/fsQW9ja/wunirugiwipoditisafetiw.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/WghghLb/football_players_of_liverpool.pdfIn PDF document text
    • http://proba7.xyz/arteriovenous_malformation_faciali1a3o.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/iVrEhha/26300869465.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/YEjcghP/hsn_curtis_stone_sheet_pans.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/nsL3mjf/7293000246.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/chick_fil_a_honey_roasted_bbq_sauce_nutrition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setovoj.onlinewebshop.net/9044979411.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/is_the_mini_mental_status_exam_free.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_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 5064 bytes
SHA-256: 288bd3da7431605968e41fce6cb283b7483c4c63521c2d5e158a6dc4e186236d
font_01_sfnt_off0001002b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 10600 bytes
SHA-256: 5d79a3582a3d4a94a53f35d1d030c1c135c621fa399e741a71d125cfe259a918

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