Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0979a1085f463f8…

MALICIOUS

PDF

84.3 KB Created: 2021-09-21 05:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 462df511555bb40908e1087099a72621 SHA-1: d3c63740912974ea388d8130ada3b00bb9f55ec9 SHA-256: a0979a1085f463f807ca2904cf38c1d76f150dbcc375f23d3f895922f1f9126f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://csc021.com/userfiles/file/20210919052202_2gho2f.pdf In PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/33193900167.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/gijipepopu.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/31489104218.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385cffcd221---1861545224.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/37380694988.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/fijojow.pdfIn PDF document text
    • https://cet.sk/res/file/pifabosesolinodi.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613686e8647a6---folulogogimajafa.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/jonenibapusawovusenekixez.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc80fbec48---tinenozokajemivibaru.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/32833506953.pdfIn PDF document text
    • http://shahgrp.com/uploads/31873018675.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210918_114219.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fewagajezevevidikokuzake.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/49028560443.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/91182960741.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/40876120859.pdfIn PDF document text
    • http://tcihk.com/userfiles/85833495589.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/misenedodumezoliporobifos.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/kesapuvag.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/88730411257.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/jumixutisufegiba.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/65192728706.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/44405498232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=big+data+and+analytics+pdfPDF 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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 10608 bytes
SHA-256: f3c5da4174d95b2ab3b4158f83fdf215f624e82220f1c4f31e2e835cfc56d534
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F6 17932 bytes
SHA-256: 65a65d57aafc9cf6829a49f81a020a8234f50cf004782b35de5b820978e2e94e

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