Malicious PDF — malware analysis report

Static analysis result for SHA-256 db731f0a3640cbf5…

MALICIOUS

PDF

72.2 KB Created: 2021-03-11 06:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ff6f1ae231babb97d30f8bd2f880292b SHA-1: 6386b0ef322456f469801f74b256e58bd082d5b3 SHA-256: db731f0a3640cbf53e99cb0eb1e9e4879a93e67e269db622abd54738dbcef05e
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://druttle.ru/award?keyword=algorithms+in+c+robert+sedgewick+pdf+github PDF link annotation
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/wugatikipebowo.pdfIn PDF document text
    • https://vokipokulolobu.weebly.com/uploads/1/3/4/0/134016984/pibilifuvexe.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/zodopujafufurore.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/lenubetiduvo.pdfIn PDF document text
    • http://notdull-eng.online/la_nueva_derecha_alain_de_benoistidtcw.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/28a9f7ad54ff55b.pdfIn PDF document text
    • http://help-copyrightservice.xyz/yearly_compound_interest_excel_template0kkhy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fe7e89f8b63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5fd9a1cb46a1b.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/4067428.pdfIn PDF document text
    • http://hookup157.site/aerogeneradores_de_eje_horizontal3rpuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_60188a4f16434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_602f4577307da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_5ff69502c4cf0.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/written_pattern_for_virus_shawl.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/a4d2733a-bd42-4894-b61c-1d61274b00c6/how_do_you_cook_brown_jasmine_rice_in_a_rice_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1090cea9-bf81-4987-b929-cb674148d4fc/quantitative_investment_analysis_3rd_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57c5740-f065-4a36-801e-d293156d88a7/73942444990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d1ca8b-9f49-4d96-900f-d9a724b1c477/rusawumuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d2780f-dca2-4691-81bd-9d759073b2ca/el_nombre_del_viento_audiolibro_voz_humana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8783066-d3c7-4ff1-bca8-680a710b7edc/value_education_meaning_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5545b1e-5478-4bae-ba90-88847e0811d4/development_as_freedom_chapter_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce7b15e-f720-4b23-a24e-5611407e2dea/tuesday_with_morrie_book.pdfIn PDF document text
    • http://pigutun.myartsonline.com/how_much_is_a_bale_of_pine_straw_at_lowes.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_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 5644 bytes
SHA-256: 33abd7714c1408f03f3317d4640ee63a857c6f6ec052230c1505bb46e5ab6cad
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 10380 bytes
SHA-256: a962ad5ed6f222ad70c821f7460d2f08bc36bd485befd7407cf8a333c542bbda