Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea9a040658ea44b…

MALICIOUS

PDF

88.9 KB Created: 2021-09-12 21:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 725f1e7bfd0c2e3ed42e547278c20543 SHA-1: 703a09be76fe97d042119b0a22437fd7fbadc02e SHA-256: dea9a040658ea44b55cb4070de20b8fa6afb3f7982eb52916f2373ec93ec5bcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to distribute phishing content or further malware. The presence of embedded URLs and the ML classifier's high confidence score reinforce the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=android+tablayout+with+fragments PDF link annotation
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161342763b9dfd---49119470414.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/guzakulimepujikimubase.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/82543101448.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/8942524334.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/legapezuridegu.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/sopinofufito.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/21549722363.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/97042922401.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/36949287331.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/jevixiguxera.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/84166659941.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161355e086bd29---43602477346.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f95f5db8b---32059880098.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/fidavufabazepopodab.pdfIn PDF document text
    • https://dafelia.com/files/29572640035.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/1rcoh3dhdavk4e0n9adn88fg5b/bumemun.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161324133ee86f---57161206339.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/56090349386.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/30857508245.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9ddaea5aa---fanekewu.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/61164373955.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/9370006580.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/sirena.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_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 11220 bytes
SHA-256: d66281931fd3dde14e8fda67939085fa44b369ff62db169868a9ea0880b81126
font_02_sfnt_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 17744 bytes
SHA-256: 7439168d11198a6353aa6c21c853edc1efec2a45a5a0bc63b78a8f97a55f1ad4

Open this report in the interactive analyzer, or submit your own file for analysis.