Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb572bfb7e008a7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 18:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 38749a8d180893f651d05727eb205bce SHA-1: 82908b2bc4f0058994b2052a13d9f20bfce53860 SHA-256: 6cb572bfb7e008a779a5ed3cd09fab39b5a919fb63e31efb279328777bf14a12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent URL pointing to 'soxebez.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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://soxebez.ru/123?utm_term=casio+3157+watch PDF link annotation
    • http://ziwigosopijulal.mygamesonline.org/68313616369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_600f986c52a4b.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/ginukowoniwomo.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/how_to_make_your_own_crown_royal_peach.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_5fd0efdabf082.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/psychological_assessment_near_me.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/125cc_pit_bike_engine_parts.pdfIn PDF document text
    • http://manovina.mypressonline.com/little_women_book_cover.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fcdc292efb0a.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/8432057.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/6892953.pdfIn PDF document text
    • http://digovin.getenjoyment.net/falonulafuzoxip.pdfIn PDF document text
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/jexuva.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/89533553240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://migumirokive.epizy.com/bakonoduzonutoxutiro.pdfIn PDF document text
    • http://susabumo.atwebpages.com/6731805735.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_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 5176 bytes
SHA-256: 5342944f57d6d75d8839a61cca0a758b1571c7aef705d69cef0601e6f71d3897
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 10696 bytes
SHA-256: 4f9108c14dd3491ee9c3cda1f184315690a98671d0a6313fc8b6f1ebff49274c

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