Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b84e9d03c2dea47…

MALICIOUS

PDF

86.9 KB Created: 2021-02-27 07:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03fe7e6589718912c73d560c3d83b654 SHA-1: ed71c94c11dd222d1f4588cf279a4a6e5610940c SHA-256: 3b84e9d03c2dea47053e3f001c8ce0127d7a7e28695a5e04727a4b1ae9e24e55
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive content and lead them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wb?keyword=what%20does%20tbt%20mean%20in%20text PDF link annotation
    • http://netewe8.xyz/fawibifegezulo6mllq.pdfIn PDF document text
    • http://frontglass.xyz/ayyappa_telugu_songs_by_yesudas56c95.pdfIn PDF document text
    • http://bio-ita.fun/best_snare_drum_practice_padl5izl.pdfIn PDF document text
    • http://jilekuxajosozul.iblogger.org/rugajusojawutikexamojus.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/jbiOjdt/photo_collage_art_definition.pdfIn PDF document text
    • http://fherixq.com/what_is_solution_set_in_algebra8kj0y.pdfIn PDF document text
    • http://ideal-it.fun/yuanta_securities_co_ltd_annual_reportgz3ef.pdfIn PDF document text
    • http://mainsale.pro/mewegekagukobof0w.pdfIn PDF document text
    • http://goproits.com/totogivawanematoyq40b.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/ghdjiji/50145407491.pdfIn PDF document text
    • http://fipirovivupaf.22web.org/14517937642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasazotim.rf.gd/kvie_program_guide.pdfIn PDF document text
    • http://nazifaba.rf.gd/the_caged_flower_movie_free.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/59125645659.pdfIn PDF document text
    • http://wivepawa.epizy.com/11954446448.pdfIn PDF document text
    • http://daluxufugul.epizy.com/38140633287.pdfIn PDF document text
    • http://jezeladi.rf.gd/in_the_mood_for_love_full_movie_eng_sub.pdfIn PDF document text
    • http://jotozig.rf.gd/rigijasafumite.pdfIn PDF document text
    • http://zufisad.rf.gd/formulas_de_geometria_analitica_en_el_espacio.pdfIn PDF document text
    • http://mumawapuxol.rf.gd/dietary_guidelines_advisory_committee_2010.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_off00011409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11409 5156 bytes
SHA-256: 3605195835d48674d5cf3149d090b149c0f0eb565d1c0f813f75d0a89af30bdf
font_01_sfnt_off0001257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 12152 bytes
SHA-256: 7bf2def46cbf32087aed75099e7cdd32bdad7607773bcd1aa7dd3919addd52af

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