Malicious PDF — malware analysis report

Static analysis result for SHA-256 87eff395bf6018b9…

MALICIOUS

PDF

79.7 KB Created: 2021-04-09 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: edee08113754edf1eb454015be92e4bd SHA-1: fdfc8ce9c26c31781ebbe9059a135d28fec1be12 SHA-256: 87eff395bf6018b9807ee117ba0c8b9208e04e4f363032bb17bace504b6acdb5
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The primary URL, 'https://soxebez.ru/strik?utm_term=sony+alpha+a3500+price+in+bangladesh', is presented in a context that mimics a product search, likely a lure for phishing or malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

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://soxebez.ru/strik?utm_term=sony+alpha+a3500+price+in+bangladesh PDF link annotation
    • https://cdn.sqhk.co/duxisabaza/jikhgyw/cover_page_template_chicago_style.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/xUheyij/death_worm_free_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ehgiQji/30696983170.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/KBggePG/17441450974.pdfIn PDF document text
    • http://nikopexuvedafes.iblogger.org/cbse_class_12_physics_question_paper_2020_download.pdfIn PDF document text
    • http://jidagepopisar.22web.org/5798538583.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/igfhbjb/bavifuv.pdfIn PDF document text
    • http://berasowugixo.mywebcommunity.org/acl_injury_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/1sQFtpc/domupogalunoletirumememi.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/60069343802.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/uhe4jgf/leminoduvidi.pdfIn PDF document text
    • http://vebilodugisugod.iblogger.org/yearly_calendar_template_2010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowelotiti.epizy.com/82427930784.pdfIn PDF document text
    • http://jifupupuf.epizy.com/bmc_molecular_and_cell_biology_impact_factor_2020.pdfIn PDF document text
    • http://matunojusorim.epizy.com/how_to_get_flexible_without_stretching.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/autoimmunity_definition.pdfIn PDF document text
    • http://tamexajifosu.epizy.com/ghaziabad_weather_report_today.pdfIn PDF document text
    • http://masosoxejonejov.rf.gd/autocad_underlay_slow.pdfIn PDF document text
    • http://jopinewo.epizy.com/occupational_safety_and_health_program.pdfIn PDF document text
    • http://birukuf.onlinewebshop.net/biseptol_960_ulotka.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/rodegifek.pdfIn PDF document text
    • http://fusutunililafu.epizy.com/english_fal_lesson_plan_template.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_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 6112 bytes
SHA-256: b5a1e6ab2615165c047ad052587d96819c16e719025eb19e2981fb5df71cff24
font_01_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 11200 bytes
SHA-256: 2b7f3ab2b9065a3b79a44446bb14d6bd5560bdf6d8fd04526f12fed0c418b9ff

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