Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5e1397dda011dd…

MALICIOUS

PDF

72.0 KB Created: 2021-06-12 17:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d18ec75c06c95d513c56e99a441969f4 SHA-1: abcfc7aeb2912ca62c0d9701a7d78f0afaffe0b7 SHA-256: 4f5e1397dda011ddf4f50c83d9103bf0057fa6657373b25c8874e6379e6caf91
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://oniceh.ru/uplcv?utm_term=ayan+songs+download+masstamilan PDF link annotation
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/k8vab9nh7luvv4mdoig6gvqmt0/kukopofi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160811b8ba7dbb---61329001285.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/17989583692.pdfIn PDF document text
    • https://vaynow.com/wp-content/plugins/super-forms/uploads/php/files/e792ab6ed48359cd23d60302765b4028/73079073438.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/568919d051af0b01bc9bd1c92aa54d30/15907312760.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/b8814876d29232f68b03503aa49ed3ec/kuvigomixuwo.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/73048151085.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/9c59c273537ed9ed47b00eb7c08aa840/10445343993.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/916bc0530c6a61e22aa0f5e4c2589985/xazix.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/xulubiw.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/25m7ft8373g8js4bv1vv0qa9bt/sitewinabiwivasedin.pdfIn PDF document text
    • http://planbmedia.hu/files/35997846043.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/3ic0plnmvedqtqch9054q8cml5/nowoxajajobuzakupenaz.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83a24573c---86995781947.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/92e020c62c8bfb1da67475cf6fe7214f/43111164059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 5232 bytes
SHA-256: a87c344c07ffaa533f9621494ab5ac1024e9138cf9f248e9ad29016c3c54af5b
font_01_sfnt_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 10728 bytes
SHA-256: 5ca70228c7397c5bf3441efbb6b0c75e01a7e711084a528ae9476ae8ef77e88a