Malicious PDF — malware analysis report

Static analysis result for SHA-256 daca951dfa6982c0…

MALICIOUS

PDF

76.5 KB Created: 2021-04-26 09:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6e60d431492206824c8e76101cafb8d5 SHA-1: e93b1106de803b5f465c381e4490b7805fa3b10f SHA-256: daca951dfa6982c0ba3f8c883c42aaf1efd171934ec89da20a5f98fa57319295
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=casio+5255+ga-150+price PDF link annotation
    • https://cdn.sqhk.co/pemenixa/iiOIfhf/93843795733.pdfIn PDF document text
    • http://keto-s1.com/jusanafufiuiduh.pdfIn PDF document text
    • http://checkmycredit.info/free_betternet_full_versiondz03y.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/aohchgf/5_seconds_of_summer_song_sorter.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/78383495415.pdfIn PDF document text
    • http://lifeshop.pro/zosegivezasopopepuzedaju7mg3t.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/29691016682lwbmq.pdfIn PDF document text
    • http://in-arenas.com/nojisajuvadp0qw0.pdfIn PDF document text
    • http://smartcreditus.info/christian_meditation_experiencing_the_presence_of_god_by_james_finleysrv37.pdfIn PDF document text
    • http://jepugetojid.22web.org/gibubuvixivux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagetebaj.rf.gd/fukajinugekafuzog.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/86202715440.pdfIn PDF document text
    • http://rejizupufuxetib.rf.gd/kavubexiritowunawikuxogir.pdfIn PDF document text
    • http://tudugir.atwebpages.com/maths_aptitude_questions_and_answers_with_explanation_in_tamil.pdfIn PDF document text
    • http://tobevilojojarog.rf.gd/l_amplificateur_oprationnel_cours.pdfIn PDF document text
    • http://duribolatajofa.atwebpages.com/jetunimonedafusaralik.pdfIn PDF document text
    • http://molumazorok.rf.gd/novokuvejanum.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/atividade_epileptiforme_interictal_rara.pdfIn PDF document text
    • http://rugokabiko.epizy.com/61570353611.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/mmento_de_l_agronomie.pdfIn PDF document text
    • http://xivobipitu.epizy.com/muwinipalevomoxedasafot.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_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 5456 bytes
SHA-256: 073c6d19176e17a1076d42180e1c89b5f200ddfbe618c8970ea31d2b186f027f
font_01_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 10536 bytes
SHA-256: dd528f6ddb3c668f6daa2e2b05d3919fe2e1a668804845338431f9eae52c2dc6

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