Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e678230204023df…

MALICIOUS

PDF

78.0 KB Created: 2021-04-09 07:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d7039ae6b84a794cc328b3e9dce8f7c7 SHA-1: 5de9eb3e68dc29005030a0223c06754b17479055 SHA-256: 5e678230204023df2591d64f26cbd1a28833aef4642d8f6d689516d67e1ac105
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to use these links for fraudulent purposes. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=oral+b+pro+1000+user+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443815/normal_5fee0acc6b47e.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/bJFgfhe/rabajato.pdfIn PDF document text
    • http://pokemonrivals.online/bagiwifazirekupc9trx.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/nurobeduzeranosibuvid.pdfIn PDF document text
    • http://besefobusim.mypressonline.com/suxeri.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/48976004049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_606635c408208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417318/normal_5fd82ff957add.pdfIn PDF document text
    • http://gbo.guru/tazofewokitefedownf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fca0ec73517f.pdfIn PDF document text
    • http://tosety.xyz/69715709514mf5ln.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/heaFigC/liferikepe.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/geSUVRq/1186122515.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/fhbhaEi/funny_traffic_cone_pictures.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/does_leo_die_in_the_blood_of_olympus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_601a1d1d6340e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_604d00a793260.pdfIn PDF document text
    • http://exampl1214.com/quotes_from_the_land_of_stories_the_wishing_spell_with_page_numberszvxk4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_604cddab100bc.pdfIn PDF document text
    • http://businessoutsourcing.org/vuwotolaxakemewefukagudijdtql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5fff4066563d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5ff755fa41069.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filosoko.onlinewebshop.net/37541295093.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_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 5488 bytes
SHA-256: 79cb0f49cab482f7b98af8a3c1863ea0e8d0499885b3d584d8441aedb79003bc
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 11480 bytes
SHA-256: 15a051050468eb36e538b4a2eae7ea4d97d6851aff80ccba2ebc7bb7b4f7b1d0

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