Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d2aa7249028b1a…

MALICIOUS

PDF

77.4 KB Created: 2021-05-15 17:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 344cf8d1fb3888a6d28f9c486d35845b SHA-1: 56a0522d1d8f552074367a9f2470857d89cc962c SHA-256: d5d2aa7249028b1a3a9fb68f7885bc47b9b44085955cb6b417f1bd8df6168d8e
186 Risk Score

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 0.9993

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://dugedepap.ru/strik?utm_term=what+are+5+food+safety+rules PDF link annotation
    • https://cdn.sqhk.co/kutupejotige/RahiJST/91020685852.pdfIn PDF document text
    • http://megalit-korolev.ru/animal_farm_full_book_summarym2zi7.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/0Cjac58/wizozafixajimopenosuzasel.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/sutagabax.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/7ha4hgR/rororatejiwuz.pdfIn PDF document text
    • http://triple-doska6.club/40577760222vlsmc.pdfIn PDF document text
    • http://idealicaitaly.site/how_to_calculate_the_number_of_molecules_from_grams16jat.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/ib9puAc/42054146540.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/goluvakaku.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/9nKihS8/21174667179.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/3hdZ8ii/world_beautiful_girl_hd_wallpaper.pdfIn PDF document text
    • http://moscowflowers.online/john_deere_gator_6x4_parts_for_saleqq31l.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/jigdij7/58531597020.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/gYif7nQ/sufipatisanoma.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/87vhbjf/coronapp_colombia_descargar_en_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kemuxilajig/wOx0hhh/perfect_chocolate_ice_cream_recipe.pdfIn PDF document text
    • http://wunupewoxe.iblogger.org/alimentos_transgenicos_en_mexico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nenunosulijud.rf.gd/kukonunofozoneripedit.pdfIn PDF document text
    • http://kepipejesa.epizy.com/free_printable_spelling_worksheets_for_grade_1.pdfIn PDF document text
    • http://nopuxawox.epizy.com/9530057044.pdfIn PDF document text
    • http://lodanije.epizy.com/put_simple_past_tense_form.pdfIn PDF document text
    • http://ravuzojunoxoma.epizy.com/4558372216.pdfIn PDF document text
    • http://buwojilow.rf.gd/78495500738.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_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 5232 bytes
SHA-256: 1ed21b7b49c3dc6ff06e779af3a04fabb1b6db604ff649881be0284a238815ad
font_01_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 10636 bytes
SHA-256: 21a4a629ae092e7d28a731420dec697e7aab0be9a6f7128f9d41c60ae3aef5ca

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