Malicious PDF — malware analysis report

Static analysis result for SHA-256 430d114729a2e52b…

MALICIOUS

PDF

89.7 KB Created: 2021-06-21 01:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f70b3d1498be7dde12c3dda45840f4a5 SHA-1: c47da943626bd7eba79652dbe5d7ca72209ed9e3 SHA-256: 430d114729a2e52b5867f8271afdd46872cb26e8e66732217f0a58dcc521bf09
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1a7882c2d---24266203187.pdf In PDF document text
    • https://pet-fashion.ro/mm/file/58212284290.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/fonedeniwikazire.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160746b6e47297---kedabuledodofejo.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/iaue7r1oadpr5veo1pmtsjnl23/laraziposafajaposunod.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/vuwuduvuzusukekalu.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/siwusiledaluk.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/n2ilivuuifhme9t0m6ocnrb0l5/zudugisawinelumipu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gqo9th72424086ags85ksah3q1/burutupuji.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/6rceurtbcopi29de2imm7p4i1k/kipetopizesetavitebogifu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/lukikuwexeke.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/169501070860cfbd4ca712e.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/61133820057.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/7iee617l9stdad6ti0ut5389q6/70177404512.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7ea327342cb1b3fafa452d53629d8995/60693872164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=modern+city+minecraft+texture+packPDF 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://scripts.sil.org/OFLIn 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_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 5332 bytes
SHA-256: 2cdbd18aa9dd52551968d0b24a9735f79ec39a87b35171fe3e2363fd9504f41e
font_01_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11116 bytes
SHA-256: 94e677e8ddb076018cc7cee7ec9e654a628ce97e83b71434bf61d108952419ba
font_02_sfnt_off000143bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BB 16460 bytes
SHA-256: a46c975b5ef5d519b15a7c4b5b8f32827da538f2864743aa95542af1efc0c799