Malicious PDF — malware analysis report

Static analysis result for SHA-256 5662f5e5696106ef…

MALICIOUS

PDF

73.1 KB Created: 2021-08-07 03:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fea59f5a33368e04cf8f82013d691fd1 SHA-1: 7ec56981a3b30ebd99e84232db59959a06760086 SHA-256: 5662f5e5696106ef52a1f9d96c7a89b4a78ff4df7f60b8a07308fa3f41245bfc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The file functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting sites. These links are likely intended to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • 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://pixomot.ru/uplcv?utm_term=wonder+nation+size+chart+shirt PDF link annotation
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ed62b160d1c5c0eac8834d6e7b25b657/33046204627.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758ad428473---lupigigejefubatabarazez.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/korarateninimavaduj.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fb5d6bc79---gomijojilix.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0ca8eb606---48810325949.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160af7d6536601---78775506005.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd0ce2cb59---13608351333.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/13677305786.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44ecf3c111---dejutivegojexakolopel.pdfIn PDF document text
    • http://minhanh.com/files/gikigutoj.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vt1k34csgibevdivbc3fgpgam7/72009868177.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/95394815781.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/6818964663.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/fadopukiwanusetud.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/56531676499.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/nsp1lni3a8igl02tu72v1ces67/64822896455.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/vowirezeluw.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/6ptottomjh7j660j8fkdqh9vg5/44822990442.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f474207260439e2fbb767e3e33994cdf/81127629436.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/rifinerazudig.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/403e1b5918b1cd58a9af4ed8eb5174cd/wisokivokolazovizu.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/76341438236.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/0331dccbfdec7a1b5ff28f349df71e73/lekozuduzetenaf.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_off0000ba5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5A 10472 bytes
SHA-256: ba42289c69455535e55a876299db181b289b374a68c41dcd62f0da4d9e34732b
font_01_sfnt_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 17396 bytes
SHA-256: 949471e39d5cd5aff3dea34363cd273f2c7dae19b83a47e324c37fcb1ba68a24
font_02_sfnt_off0000fea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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