Malicious PDF — malware analysis report

Static analysis result for SHA-256 b086672980897c23…

MALICIOUS

PDF

71.9 KB Created: 2021-09-03 15:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0abb23098409b5cfb6880bad3769f73 SHA-1: ddd35ab00e6f5d7d21b454d8f2469299ecf9c5ca SHA-256: b086672980897c23676fa1b70a13e2e9a22dddf18c4332e2471294847ae73f8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. The presence of multiple PDF link farm heuristics and the overall structure suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://rugsinc.in/UserFiles/files/45305088407.pdf In PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/h3p0r23rrm9bcnlu07pds6ef99/7713909974.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/kuleruzekal.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/18054173704.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19906c043b---22613312677.pdfIn PDF document text
    • http://termocity.by/pics/files/sabopigazarawexukevadu.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac27e156537---62286292754.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/58097308312.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/43958985478.pdfIn PDF document text
    • http://bidhichand.org/sahodyatarntaran/userfiles/file/88764647347.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f96dc586925---fefibapuvudopi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089850d68376---36792114894.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/75aa37ed862129eec264d6895cdde232/10197837781.pdfIn PDF document text
    • http://poorclarescork.ie/images/fiburipakudavapibazunu.pdfIn PDF document text
    • https://makenie.com/upload/files/63671415803.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607856a611c65---nukikeruxovotogorelelidim.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210629_536F75A2C2394DE1.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/kabov.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/jawozulima.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/wixezo.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/gipegexerumasomob.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/tukakoxuwiputaminikaz.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/nl4aei09m4jnhi88g609531da1/wozodiridimuv.pdfIn PDF document text
    • https://ultralloy.net/upload/files/12875564919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=norgren+filter+regulator+manualPDF 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_off0000b875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB875 10464 bytes
SHA-256: 3e951ae745836cf29ce0208e4933a5c703c69c98501cb4ffdedc6ea8629382fd
font_01_sfnt_off0000d02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02D 16128 bytes
SHA-256: 0d0db18a2c19f013f9a6f1b9e04177834edca2b90fde6015bc7c03273ef9e441
font_02_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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