Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d2ca08e228ed71…

MALICIOUS

PDF

72.7 KB Created: 2021-09-03 20:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e1bec177fd6d03ab5f9c79e51e2ff0a7 SHA-1: 311ed55fc8eff26172b8d7a65006aa6c01c01cc1 SHA-256: 67d2ca08e228ed7112b60c2de452a688aad007f41d0d94aa829aef192a37a10a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate a likely attempt to direct users to malicious websites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=trenching+equipment+pdf PDF link annotation
    • https://butterfly-propertymanagement.com/userfiles/file/ravukuboxunelajixoruga.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/xuganuvurajazugote.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330397849b---vasuzezixovinasagije.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d04dae38b---rejevoxafogimowabedeki.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/pogowamawewojebigudazap.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/10033992491.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160706d8941953---wudalafajolemama.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac2c82419---dulesapoto.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/938420bf55b1c81de7505091e3ec792a/39443436700.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/81666965986.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cae852758---60026715077.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/sumexedepuvibal.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/ximomivalakamawuz.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/4cbf8953ef456142d75b2cc996783f5c/34846113808.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0dec218b3---46492973695.pdfIn PDF document text
    • https://europartner2.pl/uploads/fosojefidilabibumawufutes.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/sotiv.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1627093657.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/58538907882.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/gaxufaxesupizuzojoba.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1612fac4d6dc9a---xomatusapegetosunefir.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/3835022053.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_off0000bd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 15584 bytes
SHA-256: 11cecae98db27d1e7e7a69fc9f7c60bc1b09c2f846925d13ab9b1f47642354ee
font_02_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 10780 bytes
SHA-256: c217c6ab0ebb09343cf26160b1bca7301dde26d550d571bc387caade1c12c84c

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