Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0edaf260f786b40…

MALICIOUS

PDF

102.0 KB Created: 2021-07-05 19:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5dc293c18c5b82e165e46c295fd99264 SHA-1: 5a5b02580bb8ad0520724b54afb1ee8780fa3106 SHA-256: e0edaf260f786b40f3c5678d7453f5ebd6e1672c4d73f6131454903eed426834
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and compromised CMS upload links points to a sophisticated redirection scheme.

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://synerhu.ru/uplcv?utm_term=presidential+primary+2020+candidates PDF link annotation
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/f7lqhvh67sookt6fl42cspq8a8/jezepetaxemidi.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6f39e3df08317dfc70dccc4706733c89/12871469933.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/435c5297770900a6d804a8a7a0c7a555/32158841409.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160700e9b91340---jidaniluliximeluridata.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/b8c665cec164c41d2301bfc8e1b343a4/72202914878.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ff3b968832922f3b0c8393701f78ca24/pigobaxelapigos.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/lezinibogadutiz.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/resasinofu.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/29591156967.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/luxisotivovubexefivoko.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/bipovevetizirowutigudawoj.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/kigokozi.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/42217051297.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbde796dce---42066537177.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa5d2778b2---xenozegibepeladif.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab299378cc3---84337149554.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb7fdca270---88431404606.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c98c204f47a83b1866633fa010cd3e15/tavuz.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e22b12c46ce81457b207a7964ee4638f/71482126202.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c40150f60d---45006416781.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/acc0524c091a1a8b9db2512a1e02a2f5/93727072805.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/n96k5e39no8rq8q3vqum31jvk2/mimajorerusugovom.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_off00012b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14362 10912 bytes
SHA-256: cfa9c36439f370da68a2b03fb97a5519c5e69cf32c4cdcd94153a00c8c83f89f
font_02_sfnt_off00015cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB4 17692 bytes
SHA-256: a2afb7ee01856a3f76ad41bbd4a74c9b1657592ade8626793dc9197ada213774

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