Malicious PDF — malware analysis report

Static analysis result for SHA-256 967e89069b20632f…

MALICIOUS

PDF

96.1 KB Created: 2021-09-17 01:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bffb8ddac652bc46d650bceb783099a3 SHA-1: d63941cba77747af45b80102a35e80b238338abb SHA-256: 967e89069b20632fa3dfbc4fbd97c5070df140ea58f05f12adf6629ddbc1fb4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=prayers+of+the+faithful+for+ash+wednesday+2021 PDF link annotation
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/fanuwikevezufasuvote.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370a5d569b5---jisejelevasat.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/muxuleno.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136172ec4c1b---6056603510.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/jirow.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/pavuzukikufemesuro.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/bagovuxemidival.pdfIn PDF document text
    • http://gensugroup.com/upload/files/zefaka.pdfIn PDF document text
    • http://turnyras.lt/Files/file/vizinugejafagewofurafe.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/0e0ee4ce9bdad4471fd135bd5c746c70/wogetudixinaxezagewimi.pdfIn PDF document text
    • https://limsurdua.com/contents/files/88388391260.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/18211913617.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/72763474910.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/28713745544.pdfIn PDF document text
    • http://abnicum.ru/files/file/sarekaxipuvutexutisa.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210906092545.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/71275285481.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/xetisaxiv.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/99147172243.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/vuvaxejegusupivamizilak.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/83666012419.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/55696162131.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vj2lmg7fvmkm57c2lb14o4vufv/35236647094.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/vekevuxa.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109170636476942.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_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12992 18304 bytes
SHA-256: 9cf27b74034bd50baccef93e1e55d4d55ef046a268123e59267ad5f2d2f8b126
font_02_sfnt_off000158d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D2 11044 bytes
SHA-256: bca6188330e595a814b15656c14b25478c713553643296d0d4953dced02031f5

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