Malicious PDF — malware analysis report

Static analysis result for SHA-256 be208afc72d35bfc…

MALICIOUS

PDF

76.5 KB Created: 2021-05-05 15:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87504d68c9794b076a5b41587afb2af5 SHA-1: 93b8e6af4969b8a0d4b9e0ffc3d49904bff33128 SHA-256: be208afc72d35bfc6d4d8a6b3e1cde833daa37f72842962b5e9146fd5f00209e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'xajibur.ru', suggesting it functions as a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is structured to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=primal+branding+book+summary
    • https://cdn-cms.f-static.net/uploads/4460975/normal_604030d7c7c35.pdf
    • http://itclick.pro/514920522108xbxk.pdf
    • http://wejowadizabudex.mypressonline.com/fowamazejokujofabe.pdf
    • http://www19216801.site/44789908695filtq.pdf
    • http://potugonuxafeloz.iblogger.org/final_fantasy_xv_a_new_empire_wiki.pdf
    • http://riwalimuj.scienceontheweb.net/bexovixugi.pdf
    • http://makukenumeg.22web.org/nice_words_that_start_with_k_in_spanish.pdf
    • http://lorozetuwivu.medianewsonline.com/berlin_alexanderplatz_roman.pdf
    • https://cdn-cms.f-static.net/uploads/4425912/normal_60273e2a8b2d9.pdf
    • http://fomuvegikutidob.iblogger.org/gejisewur.pdf
    • https://cdn-cms.f-static.net/uploads/4506063/normal_604d7d485e558.pdf
    • https://cdn-cms.f-static.net/uploads/4377115/normal_606e495533a17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7eea5e41-3e28-4387-82bb-8ab9be41b0f3/kuxiwip.pdf
    • http://towidono.rf.gd/jomifibilurotexulajuzobo.pdf
    • https://uploads.strikinglycdn.com/files/cebecbb5-9b9b-45ab-a85b-fba93fba64af/53042235307.pdf
    • http://migegavirunafo.rf.gd/26766584943.pdf
    • http://sanugifop.atwebpages.com/exerccios_de_anlise_sinttica_com_gabarito.pdf
    • http://gigitepusiligo.epizy.com/tensile_test_lab_report_errors.pdf
    • https://uploads.strikinglycdn.com/files/93b37055-2892-45b8-9244-e87cbe4a4bbc/how_to_open_ge_stacked_washer_dryer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6f.bin
888a470a9cf86022531fa0a1d45b339723f5a17084796a94caedfe565e169851		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 5452 bytes
font_01_sfnt_off0000fee3.bin
c79cefa2f0e43e172c730ba9ff66248bbfada11dff13a25cef46f3cfb17dcf54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11280 bytes

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