Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0978945155dd3a3…

MALICIOUS

PDF

82.4 KB Created: 2021-09-04 18:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a222435dbc4679dd0e0c7310ce9c8619 SHA-1: 30e955ad2e3ab50db0f0afc09058395291563021 SHA-256: d0978945155dd3a33b8d8ed1e6a6cf96f5edef5df61dfc25b7339529c794edcc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/2682c3a761107f6781c7799dda192917/21260657354.pdf In PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6009df840b8f547f8cd5bbe3a9a64c5d/18396195477.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839f8173189---11281605553.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a414de43c00---23839190605.pdfPDF link annotation
    • http://marcus-1.com/FileData/ckfinder/files/20210529_64725A7C749C9910.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/dobini.pdfIn PDF document text
    • http://mmt24.ru/files/file/leweferabuzubaxi.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/18/file/20210518_004937_200.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/zufisirejebewaxorizowutib.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/femidufarilozanasod.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/betew.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/28558086097.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/26183314676.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/gepadagi.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a454b99c80---kamuxedaferej.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/83451472404.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/wijuxosif.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/2d09e61e8c356546fbdbbf0070ff0ed8/28582389807.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/75708704527.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9524e173cd---90514820333.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16126aef8f0471---7062024679.pdfIn PDF document text
    • https://avenue102.com/uploads/file/wokudexojaxonela.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160707f420188c---16242858150.pdfIn PDF document text
    • https://beaszemin.com/files/dukilatidevutewapivuz.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/13439375596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tlc+waterfalls+piano+sheet+music+pdfPDF 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_off0000d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 19708 bytes
SHA-256: b813449e6423157f18d83f52784676d7514692f8a58d6db3cf367f6e7f2d7f44
font_01_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 11036 bytes
SHA-256: 848cf20c6423ece028234a4b277aa27620ae1d4e188437b02a55b30605ba55c2
font_02_sfnt_off0001236e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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