Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd85db83e06c2cb5…

MALICIOUS

PDF

77.1 KB Created: 2021-04-20 18:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1afbf21df16a88c2273b0fb7b93370fb SHA-1: 20794a81523002b7b7480d740e126f37f8cc6c3e SHA-256: cd85db83e06c2cb5e20c3bfdf8ddfabf8aee2b7f2fed29d139ad2dd90f00f733
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, which in turn points to another suspicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=how+to+reset+my+jawbone+jambox PDF link annotation
    • http://xagowawusik.66ghz.com/jejab.pdfIn PDF document text
    • http://xivoxuvawet.iblogger.org/aghora_mantra_in_telugu.pdfIn PDF document text
    • http://sirunome.mypressonline.com/xakalagar.pdfIn PDF document text
    • http://miludigava.22web.org/4908272970.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/xefezesebusu/kufijanokabatogovunu.pdfIn PDF document text
    • http://wedosop.rf.gd/hey_jude_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff55f8e3-5c88-474f-b27e-8dddf58f5b48/sidunatoxedimawofan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31bf6703-4ae7-41e1-a00d-c24b50c05abc/the_way_to_rainy_mountain_questions.pdfIn PDF document text
    • http://gupupofof.rf.gd/dewexelewowawe.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/laws_of_attraction_movie_online_free.pdfIn PDF document text
    • http://pitaken.onlinewebshop.net/tixudobulimikujikol.pdfIn PDF document text
    • http://segimoto.myartsonline.com/raspberry_pi_assembly_language_raspbian_beginners_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1e3b97-b5b8-4e06-99c7-28203b1baa90/how_to_write_assessment_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/how_to_visit_breakout_rooms_in_zoom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b201d0-072c-4d3c-bd08-5d9f2f1f3014/besuxirotazegofoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/lojuduzadulo.pdfIn PDF document text
    • http://sasilefup.rf.gd/basics_of_civil_engineering_notes.pdfIn PDF document text
    • http://jemexugovi.rf.gd/futudejujogetoboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db9096c-27bc-4ccf-8f33-72db8cda4aca/the_lord_of_the_rings_3-book_clothbound_special_editions.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/losufa.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/how_to_do_computerized_accounting.pdfIn PDF document text
    • http://gigedokaveve.rf.gd/79502866125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9866e7d5-74c5-4d4d-83f9-6775532db70a/48597831840.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_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 5236 bytes
SHA-256: d43f3da78cc52e6462227f03d68c1fc3b8b1a3faed605a8cf8bf808ff77e9a7e
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 11056 bytes
SHA-256: 0ddb7e4755433c1122566f05399196d1b843d33a4f2ddbba675fe115f64f204d

Open this report in the interactive analyzer, or submit your own file for analysis.