Malicious PDF — malware analysis report

Static analysis result for SHA-256 6746804c1d0fd653…

MALICIOUS

PDF

80.6 KB Created: 2021-06-27 13:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b35e5297127f1c1943627e011b2a6b8 SHA-1: 7d2f94d6a9c5c3b689a680d4806ac97d2477f754 SHA-256: 6746804c1d0fd6533489487ffb4ea0f1f25398274a5c225ace7c3f9f7e725fc7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a cloud document lure heuristic, suggesting it impersonates services like Google Drive or SharePoint to trick users. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://indovinandoilmondo.it/themes/userfiles//files/bikugumizedorexex.pdf In PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/209092dc04d54f4cede216b8fab19ceb/lamokatamizigowunuge.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/e2b16110485b376eda73f43666d33346/72589925181.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d5883208---51350612968.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5549a06bb---27921485232.pdfIn PDF document text
    • https://koratspring.com/upload/file/77606497883.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7007f53f03b936f31b958cd492824bb5/74826045354.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/24834895248.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/iho6ai8k6l28u0j4gjdr71cju2/gesajopomoxa.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b1069023d93---96686064350.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210507183017434186962.pdfIn PDF document text
    • http://normel.org/files/upload/file/fixitamigefate.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99590f16f---siroguvokalusawofete.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/12f1d1f120146261348248ec88a5fa40/disejonobiw.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4751ae85b5a6ba8d3e819a84ca3a52d6/dobalivudigadobubejenimul.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/busukedukukowigupuliwafol.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49c5e0dcb---fununowo.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9b717a1df82f0baae71320afe981eae5/zisepagorikupuwijawu.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/rovupigibobaditula.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/85767132928.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bc6314a27---55845372967.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/46450255940.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/sumoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=converting+pdf+to+ppt+onlinePDF 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_off0000cef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF9 10440 bytes
SHA-256: f7f9ea2e08a72b761ebe5f5138c1a99d7f5e6a890cf03cf6748c0ff0a8188955
font_01_sfnt_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 25588 bytes
SHA-256: 1269fffca45a2da18077e9bf9eb1357aa322026b5f215295f7d7ed15de3e12d1

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