Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bddc5ae4046907…

MALICIOUS

PDF

77.4 KB Created: 2021-04-15 05:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8a233ce5e9696c9f1504e41cfd7e975 SHA-1: 90ccb50a84fcfe4e245e232d06ee37295677653b SHA-256: 62bddc5ae4046907458fcc6c0cca846edff41c63154db1232e4acaabd69ef1bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://zajinet.ru/strik?utm_term=how+to+start+rx+350+with+key PDF link annotation
    • http://gazozasi.scienceontheweb.net/56445891057.pdfIn PDF document text
    • http://kulotufiw.mypressonline.com/nfl_weight_training_program.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/98197706808.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hcjjk4t/modesto_air_quality.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/dfdb180.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/ANjjZFs/dipifowubikesodos.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/pokitowi.pdfIn PDF document text
    • https://gemexufata.weebly.com/uploads/1/3/0/7/130739895/riwupemonemi.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/gfij3ie/deer_hunter_2018_online.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/jiwobizasapininavigu.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/59079031643.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/classification_of_living_things_worksheets_6th_grade.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/boss_dr_880_manual_portugues.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/tojajikugawugejov.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/vedexajawo/how_to_clean_a_viking_stove_top_griddle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a649b8-af80-4c8b-be20-199979af6b83/bimefagutar.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/platform_ticket_online_cancellation.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/pdf_to_base64_c_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5851612-9a58-4e86-b725-d8b2b30d5531/whirlpool_dishwasher_wdt970sahz_parts_diagram.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/zewogobibijowuwa.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/budapest_tour_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_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 5456 bytes
SHA-256: c88257a9a3282da73644f5139a4c4dca9c8733d4eafd8849486fa021839fce31
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 11864 bytes
SHA-256: 54ef04c4f543eb962dd6c95681f0aedf3a8ae4569889a2f435d5589b103a7adb

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