Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc835a729b1e2776…

MALICIOUS

PDF

72.0 KB Created: 2021-03-15 03:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fd798ebe50e1d7541b6bcd387556d4a8 SHA-1: 5196af1a2c46f13e772e9b93122c06aaba540a1b SHA-256: dc835a729b1e2776069b8e5732ccc6459883ecb812a82800f8521e2c6b7e8500
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/award?keyword=cabac+lugs+pdf PDF link annotation
    • https://venatijaw.weebly.com/uploads/1/3/4/6/134680547/2cbefbcb99f07.pdfIn PDF document text
    • https://jigukijovumide.weebly.com/uploads/1/3/0/7/130740363/0f932e8f247e0.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/5heThe6/paper._io_2_hack_tampermonkey.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/ScNsTLk/lawigepi.pdfIn PDF document text
    • https://doxezasofe.weebly.com/uploads/1/3/6/0/136088479/b869201.pdfIn PDF document text
    • https://kumaradogutaf.weebly.com/uploads/1/3/0/7/130775833/julupo.pdfIn PDF document text
    • https://konevolog.weebly.com/uploads/1/3/1/6/131606720/papixiwise.pdfIn PDF document text
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/kiluxizesifepatex.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/wazud.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/4230d600973e0a.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/wezafewama.pdfIn PDF document text
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/4923117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca71b6b-0fba-498d-bd12-8c76e0b532a8/resumen_del_lazarillo_de_tormes_capitulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/kugebixiwizew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e0c353-f966-450c-849a-23505b2bad75/denovogerejaresazowow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9ef4d6-60cd-4139-a768-68b34d143d14/2012_chevy_silverado_1500_extended_cab_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ac41f3-051d-4816-9cd7-6d514ebf270e/rafowoxaloxezefubopusan.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/11238101032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a6666f-3fdf-4c69-b322-f9b85e3a1133/radical_mycology_book.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/innisfree_manuka_honey_sheet_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec371f57-1651-407f-a884-0f407050ed81/what_are_the_major_rivers_in_south_america.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/57414419035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6962656-dc97-4776-a384-58fe8a609816/pagijaforowoxotadof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf19f97-a1bb-4a5e-a9dc-1e04f641633d/80872077093.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_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 5272 bytes
SHA-256: 861d8bd21bda82ddc348a3828610e341f5f8c92e2739c31d3d16295a88f1d5ff
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 9864 bytes
SHA-256: 7e63a3a756853878b669237638509785ecb2ea9ff76a7cdfd5362035cca0576f

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