Malicious PDF — malware analysis report

Static analysis result for SHA-256 63caa0d00b9276c8…

MALICIOUS

PDF

77.9 KB Created: 2021-03-11 06:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c07604088c261eb8259b9c96fba122c1 SHA-1: 1caf64f51e33ea775993495c7694988f368832ba SHA-256: 63caa0d00b9276c8655377453736fc06263a37cde093f8b81f7bd51bf129ebc7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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/123?utm_term=aludium+transformaci%25C3%25B3n+de+productos+sl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414486/normal_6029c42f03962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481518/normal_5fd2d1ef5cfd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_6048c8d155780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_602ad598c74ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60281030d5f4e.pdfIn PDF document text
    • http://nokilibetajew.mywebcommunity.org/que_es_un_agonista_en_farmacologia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6026069ce0736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fd653812794c.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/baxetenisowijeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_602ab988bb705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_60241bceec018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_6005e7fea4dd0.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/98654424469.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/84531454198.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/dc177419-2df8-4cb7-a90d-e66666acbd47/soap_web_service_client_example_in_java_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/zazunaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cce14b9-de75-44c3-80c6-0b4b1ec050f8/how_to_get_google_maps_to_open_at_my_location.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/pdf_splitter_merger_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab330434-c3c3-4a29-a610-95736a4da958/16534759995.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/walmart_black_friday_2020_tcl_roku_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/starbucks_coffee_menu_prices_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/jitexujivitemut.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/12136369768.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/certification_of_origin_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbfbc31-cc68-4e02-855b-1a5517e33a6a/kuzatedamevejewotariwija.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_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 5428 bytes
SHA-256: 508a737bf1861256df765319defafe925be02fd44e5fd030e16b01d0ec73202b
font_01_sfnt_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 11904 bytes
SHA-256: f3158898e3d545d93f3b0217f0e939b1eddbf2ef85a20775926d16177ceaf214

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