Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4365e825ebf1b8…

MALICIOUS

PDF

84.6 KB Created: 2021-07-04 23:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55498c8c87a9e64af10aae01ccd1c496 SHA-1: f81ce65b4b1519cb9ea85384f06daeb1c72df9bd SHA-256: 2b4365e825ebf1b8b95fb42f8076e478afcdfbeb27e19e1fbc40eccc7c9cb16a
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a credential phishing lure, specifically impersonating Netflix. The document contains numerous links, many pointing to compromised WordPress sites, which likely serve as landing pages for the phishing attempt. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or trick users into navigating to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://wastran.ru/uplcv?utm_term=types+of+literary+theory.
  • 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://wastran.ru/uplcv?utm_term=types+of+literary+theory PDF link annotation
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e7e67706---niguzewilokipa.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609df8372aba8---seripuvepedul.pdfIn PDF document text
    • http://dges.in/userfiles/file/83325719798.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tq4di99bc3a5vu1m39bnr8sqc4/tefegawuzagexe.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/5k13659dkacljdhvj0ept9rch5/55380139485.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160803728052ea---37960962049.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/patasunumaj.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8dfeae66b---rixuwu.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/puxujozenejijuz.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210506170628.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/au7romfc5qr8f1bkglpd6iqq8h/kadajije.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f7df0c32e---jukagukazobi.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/vulawoda.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e01b9dce4---safedulapezipipajurunub.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/6f3261952d24ca36331e82b6df38008c/nufebiviwenabufegepe.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2ab3fbe08b0c57f4536ee6d9fc20be5c/wiled.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a3df4df2c294593483d9d32007224599/pofojozutirugotaxo.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c37963c2---koxofikunusesodimulipo.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210610_6EAC537A84B5DB24.pdfIn PDF document text
    • http://berbun.com/user_img/file/gigodamokawolakebalido.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/42297854698.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/xisejejisenitolokipemi.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/dozuruxuzad.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c821ce189---wolizatuwogis.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/92843457265.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0d057e3ccb830287c217d71ffc789ce1/91279653709.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_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 10428 bytes
SHA-256: 9781475f99c9d033c368889978b0737083b1d8672951cd1aa3affd499c7dcfff
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11943 16896 bytes
SHA-256: d73422f8bad22a2f057e1430dc8ec2428e88e6e6c9c009d8862d35dd609799a3

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