Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae37186082ce42e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-01 00:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: cdb2a14f597844b418f07cc71c98af64 SHA-1: b10cf2bf7e5a31fcce235ffc005b5ada47217010 SHA-256: 2ae37186082ce42e9f66ea4ee5ddb3382c38961aaf4f2c76a133bc4bc6f524df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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
  • 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
  • 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://queure.ru/uplcv?utm_term=robin+and+wonder+girl+young+justice PDF link annotation
    • https://upbfassadenbau.com/upload/file/51491179899.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210719_5EF65AC1E2A298C1.pdfIn PDF document text
    • https://kawanmto.net/contents//files/82671401455.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/wojufax.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1611705f8c6b4c---59036687656.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/39754752024.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/21653610848.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/gatawevorotumosogew.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/35866367106.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/407160b027f1d6733728bb2dd085a217/6433073970.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/gd8oh1c07m8nqq193lju7vfgke/6688228262.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/23605668286.pdfIn PDF document text
    • http://dgjst.com/upfile/file/51045143165.pdfIn PDF document text
    • http://baoveantam.info/upload/files/52796535115.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b803c7edd---vezibaz.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/bifodivatopuputefumamuve.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b54ee21fb---jaduwazigabumorubobaw.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/726706014da55a9136b036d2d9d289c8/91192906533.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/65bc578a4627ee6bac346f371c792e25/60023395188.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/dotolozaliziwotenuxal.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/97je9ofsa89247nq4j82iv5d85/fonovapisupusak.pdfIn 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_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 17832 bytes
SHA-256: ad403b2d22e54f41726ab49be283e9ed4b140a31a5820799bcf4483eb05b168e
font_01_sfnt_off00010edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F3 11160 bytes
SHA-256: 403c9001fc4ba5e14b088b9c5bfa310d26f9dd9cf848b76034551d3496d7e72d

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