Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3776372a263584…

MALICIOUS

PDF

100.0 KB Created: 2021-03-04 15:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: da0bc6985c587370469b93fc6155c54e SHA-1: cc3fc4e05b5d0704135187b9df53c88ed3f2eafe SHA-256: fd3776372a2635849d70d5f3ee4655cd55108de00c9d8ae922e0cea2764be120
186 Risk Score

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://druttle.ru/award?keyword=nordictrack+treadmill+exp+1000+x+manual PDF link annotation
    • https://kevapesezivobi.weebly.com/uploads/1/3/4/8/134893959/4521781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_60260c5199ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465131/normal_5fe69f3e4d1a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fe0b9484b50a.pdfIn PDF document text
    • http://titoto.xyz/asp.net_mvc_viewbag_listbyrvw.pdfIn PDF document text
    • http://keepmaxi.space/durga_amritwani_mp4sdfvf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_6022e76ea2df0.pdfIn PDF document text
    • http://zuviferufudufa.iblogger.org/advocare_24_day_challenge_book.pdfIn PDF document text
    • http://sigixez.22web.org/aastha_movie_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_603568106bbd3.pdfIn PDF document text
    • https://jabelobiwisaga.weebly.com/uploads/1/3/1/6/131636903/da48db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavemadimakok.epizy.com/voxedenepidosavuseze.pdfIn PDF document text
    • http://xopoluranolaz.rf.gd/66171704343.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_628b537876084469873d48689bd79e58.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_6d8c2af74ff8499ab3aaaba0044de477.pdf?index=trueIn 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_off00014538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14538 5336 bytes
SHA-256: e03a09caa6db80214985d002435b51742eebe61fcacb3c721830ec5ed1f8dd55
font_01_sfnt_off00015758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15758 13816 bytes
SHA-256: f82bc3d4ac907e13fbe3f6a26166748a7e1ff7c442036d28531df45e34a4203e