Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bedfb388a15e3b5…

MALICIOUS

PDF

92.7 KB Created: 2021-09-01 11:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 55d08e7b76e7a6f51ec79f5b23f6cca6 SHA-1: ac7fc7a199c6274f219c763f0bca17c4fbeb1e77 SHA-256: 0bedfb388a15e3b5cc67b69fea3768b795712725244b193cedde8a9af24850c2
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to host further malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://campingwithconvenience.com/files/files/tefej.pdf In PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af596ca27e7---24025393558.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/72f6becbb1f8121f4f100447245ee221/2392465498.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afb8a599984---gowukapimuxizadolivexezek.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160723c42e65f7---82610411822.pdfIn PDF document text
    • http://geraldinekilkelly.ie/jawapijewolotolanuz.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39941753162.pdfIn PDF document text
    • https://anup.bo/images/files/mikupako.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/30648496345.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ba07ecbfc---lupifu.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/63189178407.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/wugolaride.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/44286072999.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/gevenilekaku.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f20d25d0f1e---21385589098.pdfIn PDF document text
    • https://chpcentre.com/files/file/82452246917.pdfIn PDF document text
    • http://thongthien.vn/upload/files/89485521623.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/30872753458.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/47738229614.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/26967207299.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d2128a78f---68877359116.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/zerirufewagafutune.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c0652daf0---12683509676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=direct+debit+meaningPDF 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_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 10520 bytes
SHA-256: 90a10e93fe099c87a0341281309081e4a3a0698c756f1008dfea7abb59383fe0
font_01_sfnt_off000119f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F1 18700 bytes
SHA-256: f5e8a70f1fc8a30a5339d9006cb3404ee4107b100af90bf86b234e66b259dfd3
font_02_sfnt_off00014b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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