Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5af9284498033e…

MALICIOUS

PDF

71.5 KB Created: 2021-09-25 19:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dbe32023d1820ac3c72eb19b850ba5aa SHA-1: 5be89ea9d7973a629c6c5699f4288bd13c92f7be SHA-256: 2b5af9284498033e404d16f6080992533a00f9ea14ba47af4500387286b8e4f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=free+world+iptv+m3u+playlist PDF link annotation
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/nifumomokokegizugorupiki.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/gigonixumifotigos.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/79506900594.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///fowuwukenifan.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/fitilovajebufe.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/81182483613.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/15679563663.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/magafe.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/90395347257.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/i1b48h54ufb3vp84nqvh7htt0g/noxizoxufode.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/zamusetik.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/sotuxofofijuvaboroji.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/zukigufo.pdfIn PDF document text
    • https://limsurdua.com/contents/files/tufixuxemifiwesagoxo.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/sovularuvomanabibobedaxuw.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/8358166741.pdfIn PDF document text
    • http://chipgene.com/image/files/20210905_233452.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/47869304425.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/tevid.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/71290874970.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/95380883880.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d2dcd5572---zasozelisotivozan.pdfIn PDF document text
    • http://jsdarvin.com/files/57541745217.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://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_off0000b097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB097 10964 bytes
SHA-256: 7b6ea9171f85d11bff0e3c0eeff91283a565abbbdb434841499b34c61cb4c1db
font_01_sfnt_off0000ca1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1C 17872 bytes
SHA-256: 7a622004556a2bca1e53d3ed56feffa08cb107c7042b95e76efca7c92bc68b35
font_02_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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