Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afbe221abacab52…

MALICIOUS

PDF

73.9 KB Created: 2021-05-10 17:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b561385db81b00c65a6b94528aff129f SHA-1: f7fecec204216617524477412598df070c6c9dff SHA-256: 1afbe221abacab5234e5707dc11a02447e0c3193482bffa6f312089d49f2de8a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://vilenefex.ru/strik?utm_term=rimas+y+leyendas+b%25C3%25A9cquer PDF link annotation
    • http://summ-ita.space/bella_and_the_bulldogs_cuckoldd1twi.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • https://cdn.sqhk.co/mibazudifij/Etfhclw/kewuda.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/ccrn_practice_questions.pdfIn PDF document text
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/5f371befa6963e.pdfIn PDF document text
    • https://pepexelizuruxu.weebly.com/uploads/1/3/4/6/134656498/puwazopepaxuwadi.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/is_a_hybrid_more_expensive_to_maintain.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/uggbja9/moxop.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/kpGjcPo/vemupakogakoxafatuxilupa.pdfIn PDF document text
    • http://believes.space/butevijotoxe4c10z.pdfIn PDF document text
    • http://clubstore.info/how_do_i_reset_the_lamp_timer_on_my_mitsubishi_tv4i4jf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/59652595608.pdfIn PDF document text
    • http://wuxirakagatijir.epizy.com/romantic_couple_cartoon_hd_wallpaper.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/bolt_nut_weight_chart.pdfIn PDF document text
    • http://butaxogusevi.epizy.com/archived_messages_on_facebook_messenger_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/20576202528.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/88744203814.pdfIn PDF document text
    • http://zulexesovo.epizy.com/lease_addendum_template_south_africa.pdfIn PDF document text
    • http://tetexamafikej.epizy.com/ariston_water_heater_instruction_manual.pdfIn PDF document text
    • http://risakimo.epizy.com/pharmacotherapy_casebook_dipiro.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/band_music_library_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/80634739305.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 5600 bytes
SHA-256: d637373ad668d628091445b4c277587f455e671c39d6b0edc1cccac5af02f0e3
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 12444 bytes
SHA-256: 167bc481aac853a62154b8a663c6d49a7fcc8cd778245badf7260ab5eed7303b

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