Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0348aee86b44c7…

MALICIOUS

PDF

91.9 KB Created: 2021-09-14 09:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8c20398655c8727e6e1d983a92a15e12 SHA-1: 1d46c34ee90f34901c299bac53e10d24c39227d4 SHA-256: fd0348aee86b44c705236a7c1acf9c5e350f74aa94117dadb32344d0b017c924
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jcnjl.com/userfiles/files/85877991714.pdf In PDF document text
    • http://petra-dario.info/upload/datoteke/6445865836.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/kagobasegojofuxuguroturub.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/19556023814.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/rodukidutakagowugi.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/toviwoluvafonota.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/19030189627.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/74556145013.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/15775997404.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/tipesogujufup.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/norefev.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/ralexegave.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/xizojipudifutemasesivodor.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/wixivovigu.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/66598104097.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56973389912.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5f336241e---13398677575.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/pevutorudulolowir.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/95383999763.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/vogidurefiki.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/bubaxuwananupetejalejozur.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/zepomezalebe.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/zelebaxo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614033d2c8f62---23413487996.pdfIn PDF document text
    • http://baoveantam.info/upload/files/zanozuvijolazozomoxosit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+go+go%27s+moviePDF 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_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E95 17228 bytes
SHA-256: 6ea53838fc500c3f6b28ac6f591cc13c3008fe0746ab392512322777afe564b6
font_02_sfnt_off00014b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B54 10108 bytes
SHA-256: 2dcc0f5990c51ad4e2e82f6cd5165eec73460f71e7bf06432329d8eb21f44da2