Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ab64765ac48b1e…

MALICIOUS

PDF

73.5 KB Created: 2021-05-17 13:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 125e1c05c2fe4eea69bfc362c22f9a84 SHA-1: e7854cb78da22c815bf14fc3597f04e2a90c78bc SHA-256: 34ab64765ac48b1e482a4c4eedef16f40dc9047a2ac71b2e9c5a17e31481f2f7
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external websites, with one prominent URL being `https://xezojetit.ru/strik?utm_term=weekly+weight+loss+chart+template`. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=weekly+weight+loss+chart+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497356/normal_6001da53a1061.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/f75b25076cc35.pdfIn PDF document text
    • http://item-mask.top/zegibiwa9k924.pdfIn PDF document text
    • http://magic-world.site/catalogue_oriflame_september_2019duavt.pdfIn PDF document text
    • http://ketadiets.site/carers_allowance_form_onlinee9vz6.pdfIn PDF document text
    • http://scriptbook.xyz/principles_of_environmental_science_cunningham_8th_edition_download83k2u.pdfIn PDF document text
    • https://rulurutepiket.weebly.com/uploads/1/3/4/8/134881251/1601070.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/gamasesebesaxiw-jisomavulasid.pdfIn PDF document text
    • http://volosaty100.xyz/story_structure_worksheets_4th_gradexss4x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5fe2b84137db2.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/buwarumipo.pdfIn PDF document text
    • http://girajepom.22web.org/juremefolakitapukunozup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_6059071a35983.pdfIn PDF document text
    • http://passive-income.ru/235566205391sdqg.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/tiwozuzu_jonuteferifezin_jujavadis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460950/normal_5fcdb3ef6f3d1.pdfIn PDF document text
    • http://italystore.pro/how_to_clean_printhead_brother_mfc-j200afcsf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupusivamiguta.rf.gd/nefizuvububinotigoxinaf.pdfIn PDF document text
    • http://pobefazetix.epizy.com/data_analytics_made_accessible_2020_edition.pdfIn PDF document text
    • http://gijomifede.rf.gd/mustache_template_foreach_loop.pdfIn PDF document text
    • http://gawowupakifofe.rf.gd/ardhanariswara_stotram_in_telugu.pdfIn PDF document text
    • http://winovonisalupib.rf.gd/ultimo_edital_da_prf.pdfIn PDF document text
    • http://mopuriruwinufi.epizy.com/their_eyes_were_watching_god_literature_guide_answer_key.pdfIn PDF document text
    • http://fulariponazaget.epizy.com/14856621033.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_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 5620 bytes
SHA-256: 0b083be0071fcec4918bfc49d75d22e1007af755db3944aece31884f59b20190
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 10476 bytes
SHA-256: 2334d9a1d0cacf8a4e42b693c54ac887343a1101649231de1bec3d6d15458834