Malicious PDF — malware analysis report

Static analysis result for SHA-256 645430969e5e5580…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 09:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d237862b6dcd8b137593dbe2ca713717 SHA-1: 90f5165d9ae1f9c3cbcd0744128693689cc29e3b SHA-256: 645430969e5e558037aee607c0e405cd00a5b28e626211f13a8abe9f91622946
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wb?keyword=how%20do%20i%20reset%20my%20brother%20dcp%207065dn%20toner PDF link annotation
    • http://cardioactiveitalia.site/batman_death_in_the_family_2020_reviewsyd0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fc57d8f985da.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/h7iH1je/the_aether_life_as_a_god_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/gfgcZ8k/77684517776.pdfIn PDF document text
    • http://update-win20.online/sumasejegupemavakik1im27.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/1hihd6y/15462015122.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/VOnhfgi/ikea_kitchen_cabinet_doors_replacement.pdfIn PDF document text
    • http://meetporte.xyz/weladuzamazevinok4bndt.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/ePd8fja/hokey_pokey_youtube_baby_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_6027c96478d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5fef3e6c1f5fc.pdfIn PDF document text
    • http://presentinsta.site/halloween_fake_nails_amazon2mstv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_600395f972dbe.pdfIn PDF document text
    • http://abreudesigns.com/fuzevamufepebadiz9iucp.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/pilazi/negative_numbers_ks3_worksheet.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_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 5868 bytes
SHA-256: 4d5524697f35d34b3041fd120dcfe58fa07f12d1ee93f7f04d8ddfeb1ff5ea98
font_01_sfnt_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 10512 bytes
SHA-256: 6c4cdfe28a498239ac78ec67bca13e0c866b2ffcef55196467a942a772eb080b