Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa475fec24f0b2f…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 07:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8ac0937ddc1544c5e7a07b975a1210f5 SHA-1: b35e3e2c0c041cefc4cd93127613b9a4b754e5c1 SHA-256: 9aa475fec24f0b2fef2292399909e40958726f64f1ea346dabc6e0964c84dfb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a deliberate attempt to create a link farm for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=stacey+abrams+vice+president PDF link annotation
    • http://onlinevay.com/upload/files/41781149847.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/48908885845.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/guxoludawabuzejijowitelot.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987da063fd4---zojoxajapugojik.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160980667d9ec6---muxarimefovutur.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/1672844380.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/62c9004823ffe1c154bebe128c2b77cb/suxusixeweja.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/xedifitarelebejatumigaki.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/80882064021.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9573c91a1---sekenovitotekuzenor.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083123f3aa8c---daxalebojezamunenojoxif.pdfIn PDF document text
    • http://absigorta.come/file/sevar.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/konifamunogidebunozozo.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/99875822223c4357ff39e524978f3765/36622074972.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/71063817551.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wulonexozutisotat.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/33112727770.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/606npbbdbbtpk5nhjlori37joq/lipafagatudikimun.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f30ib3kgvn3h3a82o9cr10584s/80845026291.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a63bb94bff4de488e4c2a804133bcea5/legajepovukuwimafaned.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/49660317270.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/1e2c5bd6813c60f63596195a1e40ae7c/kafubitulebetewukim.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/b6f1e896f40fef3444b80d00d06d680a/27103483291.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/21088195436.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_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 10904 bytes
SHA-256: 56a19c725909ceebb661ae63746f510f0fbd63c35ebb4ea8d60c94a1f3134e9c
font_02_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 16648 bytes
SHA-256: c2d941e90d177373498b48c2bcf33f3c482ab82d598d82a8c204ea039a50ac85

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