Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2b292ab06e1f27…

MALICIOUS

PDF

84.0 KB Created: 2021-06-05 20:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fd12284a6f342e53c237d0547747f1aa SHA-1: 7f89c0547f181bd3db8681e4ca9e7ad3f7c5a794 SHA-256: 8e2b292ab06e1f271cc8c0d7eabac406ca528fb3903574f20b4aef42b2936430
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The embedded URL `https://wastran.ru/wb?keyword=how%20to%20train%20your%20dragon%20cast%20and%20crew` suggests a lure to a potentially malicious site disguised as a search result. The PDF also contains numerous links to other PDF files, some of which are hosted on disposable domains, indicating a link farm used for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://wastran.ru/wb?keyword=how%20to%20train%20your%20dragon%20cast%20and%20crew PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417814/normal_600101c6597ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_602f898163a57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_5fe56c0662f0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fef13af7a2c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463009/normal_6022c55330eeb.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
    • http://gijorugisaw.pbworks.com/w/file/fetch/144675654/64705781101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591ce23f-4d63-4b39-864a-fd27b2d386ee/9707588707.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144472359/wijeropavikatesufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2bd8880-c5af-4c17-993a-8fe4826ff5b8/quotes_of_simplicity_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9116ab70-e5a5-493e-9f4e-92c72e9525c1/the_revenant_book_summary_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7d33f5-6af0-4ab2-ba9e-676914aec3de/32905832989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f73519e-bbde-4498-81e1-784fe3d69175/71884938266.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144514863/sword_of_light_and_shadow_roblox_id.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411426/buwurezomenidelolafulawis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247e0d7c-cec7-4e28-b4b8-37f7c9d6df7a/facebook_marketplace_appeal_request_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1385bf4-a8bc-40d5-b30e-b0a8e5a11bfa/molecular_biology_of_the_gene_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851c9bfa-8c81-479f-8d01-6e73a00218e8/95224445039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8de624-f7d2-47ca-acb3-159e34bd9974/wevuxuvesuzozabuxedorud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc71a346-dbf1-4a09-b5ba-5f101cadf189/the_watsons_go_to_birmingham__1963_grade_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36447596-505a-4d8e-bad9-68393a381b96/cry_baby_gcb_95_problems.pdfIn PDF document text
    • http://labidan.pbworks.com/f/safesewaja.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/f/wedisirafowarevebajuse.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 5112 bytes
SHA-256: 7b3b19b6fbedf526cf1f2fab10083f4d607e09450c4689354616e5502180f0e9
font_01_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 12092 bytes
SHA-256: cab1d43f75f97ece1b516741e92ec4078e7918a2631cab8af74ae45da3eefd6e
font_02_sfnt_off00013423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13423 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333