Malicious PDF — malware analysis report

Static analysis result for SHA-256 012fe0813ddfd350…

MALICIOUS

PDF

99.8 KB Created: 2021-04-24 19:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 47c5e0e63a229258016f71677c26c4ff SHA-1: a2818720f691b84c897ba19c44793a7772b8ca98 SHA-256: 012fe0813ddfd350fe9ffbe066c3f78c111308f9680004e92ba42ae38b50b1ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result for a common query, likely intended to trick users into clicking. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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=how+to+check+character+count+in+word+mac PDF link annotation
    • https://cdn.sqhk.co/logenuzupug/yv8Vjjn/waturaret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452373/normal_6025ad409ff62.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/hicVmod/whispering_woods_golf_course_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5fe1268507c70.pdfIn PDF document text
    • http://usejus.club/where_can_i_watch_the_stand_movie_1994tu1u0.pdfIn PDF document text
    • http://kamini33.ru/mitorafn5vi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_602f44ae9e7a6.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/ANfNhe5/home_assistant_mqtt_docker_compose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_6003ba38b4d88.pdfIn PDF document text
    • http://bewudup.iblogger.org/authorization_letter_format_for_documents.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/yhegecx/boo_boo_records_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_60376062dbdcb.pdfIn PDF document text
    • http://italylife.pro/70282416402j6sgr.pdfIn PDF document text
    • https://cdn.sqhk.co/givikofuf/Jif0Eie/vusumisoserewotesiruzuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_60292dac1ca5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469358/normal_6036ccbd8391d.pdfIn PDF document text
    • http://vizionsmc.net/70626233076yfawu.pdfIn PDF document text
    • http://newsportstechnology.ru/knowledge_of_self_islamhtelk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_604496ced8512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403674/normal_60051b2412553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisuronam.rf.gd/test_para_la_licencia_de_conducir_en_la_florida.pdfIn PDF document text
    • http://wuviwalot.rf.gd/chapman_english_grammar_book_2.pdfIn PDF document text
    • http://gosonuvubunevo.epizy.com/bipolar_treatment_plan.pdfIn PDF document text
    • http://retajakiw.rf.gd/7720060517.pdfIn PDF document text
    • http://zujitix.epizy.com/office_absent_letter_format.pdfIn PDF document text
    • http://nirirojigupe.epizy.com/31053499756.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_off00014357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14357 5088 bytes
SHA-256: 41670cc8a5db3ea95bb103a2eef3ac0c3dd7eb9bc0c44eef1ac71c6ca86ed076
font_01_sfnt_off00015487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15487 12768 bytes
SHA-256: 1f2565a91ca6db78421396a303709ebda0c791837b1c02ca87e18ed39d0d585d

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