Malicious PDF — malware analysis report

Static analysis result for SHA-256 68dbbdcae073a933…

MALICIOUS

PDF

100.7 KB Created: 2021-06-26 22:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b0f324dc97f6862335ac60f216145afe SHA-1: d5bdd99c14d569050f561c0e54d35e86ccb617ea SHA-256: 68dbbdcae073a933dfbffff72ce93d703861b636698aac3d422600075a192ca5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and link farms indicates an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://huntic.ru/uplcv?utm_term=individual+barriers+in+communication PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2557f24f2---82984250187.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/sifiw.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/kakanigajidijeji.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6agoba4680cklc01f6vrgdmplp/64855208741.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/97737777269.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0329a920dfb4d2f86b82a8b6951cdc76/94277242886.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/2acff074c6499f1c91ac3d06f8dcc966/6704261260.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/zajesejilufewetazinitup.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4efc25e31c717975aee47cc5cc582b81/60101510476.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f339f731f3---nufamiluwokefowurejaxuvol.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3e0aebe955aa2193553534c6bb27ee7f/71231350609.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/49b7fe96888086e054517ad2703fb146/47856417979.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/xilozawisaga.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160881adaa4a16---loxevajulepugemibukisal.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990ab73358f---wijurugadi.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16096816e3da5f---pimizokaxatusobavajog.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210607045003.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/60906292754.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/muradogeluxasavixawege.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beba0950be8---guros.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd02aacfca---58206093345.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/kawaxenagarawuwufixisog.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160accc98c8668---nonubatobetefupuzu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bef232412---lufeseloxudejetar.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/rawupusi.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_off00012866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 16880 bytes
SHA-256: 165bc3df3ff49d73e3456741902e734a2ef34874845c894f8ef34be17fb5f277
font_01_sfnt_off00015459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15459 10788 bytes
SHA-256: d6826bf5d671bd4439eca689bc3669681b92813ef2648ce4fb39113be482fd3b
font_02_sfnt_off00016d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1