Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd712eade656fe2f…

MALICIOUS

PDF

85.1 KB Created: 2021-03-04 02:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 14c8b69cb420ca087720f541f8d42121 SHA-1: 353ed738500875d0d914ea12c423aae7efd8edbd SHA-256: bd712eade656fe2f69ef15856274d07f4a3a8267c1081a67c1813fdd1754e55a
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the document body's deceptive content point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=scag+mower+prices+in+nc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419644/normal_5ff9c17da0087.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/20359584952.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/f03cc5a91fab07.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/denaletes-zudujalawin-tuxamafuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fceab1ba4887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490140/normal_5fc9f70347367.pdfIn PDF document text
    • https://sulovuve.weebly.com/uploads/1/3/5/9/135973568/pikapori-xumulofibulijuj-befekokaj-napazijevoso.pdfIn PDF document text
    • https://xetetikagidol.weebly.com/uploads/1/3/5/3/135308020/9548365.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/darisowu.pdfIn PDF document text
    • https://favobilumosuxo.weebly.com/uploads/1/3/4/7/134733594/xizenejolobipal_favorobozujupe.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/voxejiroru.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/publicacion_proactiva_declaracion_de_bienes_y_rentas_y_registro_de_conflicto_de_intereses.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/d798d36f8a.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/what_is_the_theme_of_sons_and_lovers.pdfIn PDF document text
    • http://pewujok.mypressonline.com/disney_world_new_years_eve_2021_fireworks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/foxconn_n15235_network_drivers_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/sales_agency_agreement_template_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/creating_alliterative_phrases_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/kaplan_mcat_books_used.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/84000704436.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 5416 bytes
SHA-256: 4ba7005cb79ad0941c81fba352dc5c0b428a5071bbb819c95521a41271442615
font_01_sfnt_off00010c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6C 10712 bytes
SHA-256: 25087a0c82c0503133c38418b791b591ee2d5a6e0bf8b322625edc6aad134840
font_02_sfnt_off00013135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 16288 bytes
SHA-256: dfeb9f3322fe48911efbba917dd312437d61f181ca261a33bdf84bb805818cea