Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dadcdf326ece0d…

MALICIOUS

PDF

108.3 KB Created: 2021-04-15 09:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cef9ef4da48c82e1ff972ff21a79e217 SHA-1: 5a634b1ec1390f45fc2db9e382ed4c6fd784735b SHA-256: 92dadcdf326ece0defe6bd2f9b89a22c65b296af8cf81de3e0da753b5eea728e
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, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru', suggesting it's designed to redirect users to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://mezovuduw.ru/strik?utm_term=sony+rx10+iv+review+2020 PDF link annotation
    • https://pogeruriwijo.weebly.com/uploads/1/3/4/3/134340707/zilulutu.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/nisali-potagidoju.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/what_we_talk_about_when_we_talk_about_love_espaol.pdfIn PDF document text
    • https://falijufik.weebly.com/uploads/1/3/5/3/135349852/kusapuv.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/sebij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_6029048cc111f.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/9984733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_6027163c49997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_6064c4b5c505f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_5fee6d14b8930.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/nejalepalixupani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1492a2e-8066-44d6-a9db-3036909f301f/xiguramegobarud.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/59763872812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a373bab-b868-45be-9f3b-a8ccbb8cd5c8/jaluvike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c30c95-e039-4d00-ac08-e2c62325a0a1/26914587377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8ef0fc-f947-4764-a40e-2c72c556a79f/how_to_learn_python_freecodecamp.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/7048498456.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/piwitowuj.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_529c8ed0ba104a9bb89488e44841d2c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19b605a-dd6e-45de-af7b-5f48ea06b67a/lexus_rx_350_price_in_uae_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/moreg.pdfIn PDF document text
    • http://bemabam.myartsonline.com/online_doc_to_converter_and_merger.pdfIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_982b5bd97b15422a9d9d168226ea7dca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/novinifolabeni.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_off0001658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1658F 5012 bytes
SHA-256: fecb43558b6ee7352ab774ed63768d25b143f242370be55f84a018bd27b0d087
font_01_sfnt_off000176d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176D8 12616 bytes
SHA-256: a204836d18e0ef58166f64856024fe845ac066b88aff7988652609e3ada80d3d