Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bc1a6b589b10bb…

MALICIOUS

PDF

85.0 KB Created: 2021-04-09 23:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f442bb27256f5a298cfe3e7b9a297000 SHA-1: b44d9cd23353708a1900e8bee9c2890b60769d58 SHA-256: 65bc1a6b589b10bb26a0177393979a7e7113804b5b6c7190823a1ddf3285c466
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, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=weber+genesis+e+330+grill+grates PDF link annotation
    • http://zubosoxi.22web.org/web_link_to_converter_online.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/dawolupetatuwetad.pdfIn PDF document text
    • http://xivasupati.iblogger.org/forklift_driver_training_course_prices.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/92149165997.pdfIn PDF document text
    • http://rowaremoba.22web.org/basic_english_topics.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/wokijasaxip.pdfIn PDF document text
    • http://lemafesopeposuz.mywebcommunity.org/19180539476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6114fd1d-5e82-49fb-9bcf-56b4fa865355/how_to_program_a_panasonic_cordless_phone.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/how_to_bar_a_soldier_from_reenlistment.pdfIn PDF document text
    • http://rimefuvax.epizy.com/metizome.pdfIn PDF document text
    • http://gotugelimow.rf.gd/wedding_planner_contract_template_australia.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • http://gejofizax.rf.gd/gijakemajedinewelij.pdfIn PDF document text
    • http://worutigije.epizy.com/unix_system_administrator_interview_questions_and_answers.pdfIn PDF document text
    • http://lazasubesuwup.epizy.com/deep_learning_book_chinese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ddd109-d87a-424f-bafb-afa7cba7dd73/moxuwovumumebexibixovar.pdfIn PDF document text
    • http://goxunizitemowu.rf.gd/actuarial_mathematics_for_life_contingent_risks_dickson.pdfIn PDF document text
    • http://zapuvem.epizy.com/98734607131.pdfIn PDF document text
    • http://dubomebivenu.epizy.com/pesinurasadatuvokupariguw.pdfIn PDF document text
    • http://tipokeviti.atwebpages.com/chemistry_experiments_for_life_science_majors.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/cancionero_del_palacio.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 4988 bytes
SHA-256: 97c6d17fa95f36188a5e7130122f664da6c02e30f857eeea41b069a4a79a34b1
font_01_sfnt_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 11532 bytes
SHA-256: 988f5ecce51097cb0ae4047c259cba10acf1359baf565446deed7a422c17e79e
font_03_sfnt_off0001382d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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