Malicious PDF — malware analysis report

Static analysis result for SHA-256 4042f3334d25c429…

MALICIOUS

PDF

77.7 KB Created: 2021-03-23 13:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a6aa5bcc6b83f5cb180df2825961dd0 SHA-1: 9da2a15ebad77a4acacfa75d7b04b700f3460d0a SHA-256: 4042f3334d25c429158946e6405140b809115afb0f8de2d5c52ac698fcd6e943
126 Risk Score

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 0.9997

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://druttle.ru/123?utm_term=cordiali+saluti+in+inglese+formale PDF link annotation
    • http://rewetuxavix.mypressonline.com/argala_stotram_in_odia.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/038438585d1.pdfIn PDF document text
    • https://popuverixi.weebly.com/uploads/1/3/1/4/131438274/wimizusilebexim.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/aisha_chaudhary_book.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/aceite_esencial_de_romero_propiedades.pdfIn PDF document text
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/lebugodet.pdfIn PDF document text
    • https://rexerobebaru.weebly.com/uploads/1/3/1/8/131872155/pekixipozof.pdfIn PDF document text
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/daf356457.pdfIn PDF document text
    • https://sovevalejuwup.weebly.com/uploads/1/3/1/8/131858043/c99c533efd27.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/23940590370.pdfIn PDF document text
    • https://sodujamewo.weebly.com/uploads/1/3/4/7/134750465/dasonukovemofe.pdfIn PDF document text
    • https://wuxipatinux.weebly.com/uploads/1/3/4/6/134662372/bebojojeji.pdfIn PDF document text
    • http://lapivakop.getenjoyment.net/japejosunazavarokitab.pdfIn PDF document text
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/binadaxoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xanedemu.onlinewebshop.net/antecedentes_historicos_de_la_administracion_publica_en_mexico.pdfIn PDF document text
    • http://fifabal.epizy.com/how_did_abraham_lincolns_assassination_affect_reconstruction_plans.pdfIn PDF document text
    • http://dudakesiburegig.rf.gd/extrusion_blow_moulding_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/tijegakofovi.pdfIn PDF document text
    • http://wepilujal.rf.gd/advantages_of_bureaucratic_organization.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/ages_and_stages_of_child_development_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/wilugobukosaturapasarax.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5132 bytes
SHA-256: 5b14226643fd267d80a15b5af9e9843bb80b88ef0b7e5dbb9d4bff62d6f08669
font_01_sfnt_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 11768 bytes
SHA-256: e762ee45ab78adba7d0f1f72192ae5b02467e6839a32e3e2719d4ef35c55a062

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