Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0e4e42c1d0f094…

MALICIOUS

PDF

74.7 KB Created: 2021-09-02 09:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4cc5db6a9fb62f1824c8b31077e1808 SHA-1: a67753b5e1af626bb0224d593ff3b5ef0e270b1e SHA-256: 1f0e4e42c1d0f094e44247575320b1f0d39b2f8fd5a791b91cf3f8c53485e43d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards the use of techniques like Spearphishing Attachment to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://philabc.ru/uplcv?utm_term=router+on+a+stick+inter+vlan+routing PDF link annotation
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/v11qee3ugob4jdrh35v1kqcsu0/pivexetenaxi.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092b2af5f1b6---bogoluzuvatefejen.pdfIn PDF document text
    • http://forti.in/userfiles/file/62113456968.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/ligozugerilokowusozapire.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/2eb3b29d0abecd6dc7862bca14369ea3/91212152923.pdfIn PDF document text
    • https://schmitz.cz/res/file/88682527203.pdfIn PDF document text
    • https://kopari.hu/files/file/jetinibubepufurapo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacbf1cc2bc---mixezipag.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/5vpjo5kuum1ie7hupk30h6bgr7/63699789982.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/28381529239.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021071221332973499.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/59cjmtqmhtfg0vhhakgrp0oq2c/gixigasemi.pdfIn PDF document text
    • https://castel.ro/userfiles/file/2294322537.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/63590246923.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/kadevumaxumuzuzimojus.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/32612851002.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607854bb05136---sejeka.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/19491401231.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/3fa8a80ad938d012790cc3236f4e8cf4/burisewimovikoxutosodidu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16101042737911---37458287115.pdfIn PDF document text
    • https://ancoraeducacion.com/images/vowojegenav.pdfIn PDF document text
    • https://airbays.com/userfiles/file/69460328798.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610f69da12e1b---82465407234.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_off0000c22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22D 10708 bytes
SHA-256: a7403f043c11f579a6e8a9413cf7c376fb0540d766b292e24e3eda7af4ab77f8
font_01_sfnt_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 16188 bytes
SHA-256: 8c6936f54460216d3b5d808739cfdf79d6c9c2cad38984f711909888eab474e1
font_02_sfnt_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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