Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cea0089efe7c46…

MALICIOUS

PDF

96.8 KB Created: 2021-09-06 12:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3bc139309c89f4035f00a5541ec0530e SHA-1: 385e3509ed52560239d2af742a9e86ebce4af517 SHA-256: 18cea0089efe7c468683860dd2de0fe51ecb8f0c065451d9efe22c79e4eb5e57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to PDFs hosted on potentially compromised CMS upload directories or disposable hosting, suggesting a link farm designed to lead users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to direct users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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://campingwithconvenience.com/files/files/vivojekijimujakujar.pdf In PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/50377635482.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/52289221632.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/7132056491.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/43d36e80274019634d2d71d2f8ca7f1c/52109653439.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/24752430696.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2ddf3298---nefonasulivik.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/40785568548.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/wefelomufuba.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/mepexutamet.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1df0607179---zijovomiberepaxi.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/jotokozotarilolurosux.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/vezebisavijabukigazewofe.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095ba7d95ff7---zapojabezajonafuzazuran.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ec43bbf4---logejemagubifa.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/40860986182.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c52be527878---sokonixusozadutez.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b096d37c032bf367138defc6fc7b9fef/70626729206.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e5254e13f---tanigatobu.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078931f3b2ab---wudivonufugupoduzev.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/6a665bbe78588918fa1ad1426688244e/mironutirokalujip.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/tobowigugokazuj.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/05a1abb68573f55e960d21e6de27c14f/jerenuvugid.pdfIn PDF document text
    • https://beaszemin.com/files/57805598365.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608719c957f8b---20057917056.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/4q2r43p8irel7o8vg3ou4q9tif/rizunitoxeg.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/97247725571.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=jane+eyre+pdf+chapter+27PDF 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_off00011805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001301c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301C 10568 bytes
SHA-256: 2393daf055f431a83212284ee6b4970338173378b8f51edfe72b95ce88e71401
font_02_sfnt_off00014845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14845 17696 bytes
SHA-256: 36652fbd7a3aca9eb9413ee9af1140ce847dbcacd22263d643f7afd53673125f

Open this report in the interactive analyzer, or submit your own file for analysis.