Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5bfb60419ea1b2…

MALICIOUS

PDF

74.7 KB Created: 2021-09-24 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 456c170d90949e21d99b54e4b57b4e5e SHA-1: b59b716611e654ed8037ab0066276999e34b4ed6 SHA-256: 0e5bfb60419ea1b2dde2617a0d0db4719a3a418c45279856bb2543bef1d1e646
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The PDF structure and the presence of many links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://surupaceanu.ro/ckfinder/userfiles/files/lined.pdf In PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd735453f---9466753152.pdfIn PDF document text
    • http://www.polni.si/Images/files/judalonixorulujufu.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/rufixetasekaf.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/44781053878.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/mizuvuvuwogojovojukes.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/68291049680.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/9976524145.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/bemudotewumosivuzu.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/suvovudapigojonilinisaw.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/gitinoxaxaxarigobogebigev.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/12799045273.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/pasagagete.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/fobowuzigagamiwepaxavogit.pdfIn PDF document text
    • https://kccegis.com/upfiles/content/file/20210918050635.pdfIn PDF document text
    • http://jn-zhsc.com/upload/55885045824.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210904214631.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/fetedesipusu.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/rivarisota.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/faxitaporo.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/32175664182.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/zisuborevonuz.pdfIn PDF document text
    • http://panova-art.com/files/file/vomegorojitibifijup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=shadow+lord+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39E 19572 bytes
SHA-256: 818390f1f6608da982baaa992329666075b5c5a7090a8d196c047dad9071233c
font_02_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 10148 bytes
SHA-256: 8f0fec168120bb66dfbef59d469df55c36abc4071fa507bfc351901001ee46c0

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