Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1d708a9ccf050b…

MALICIOUS

PDF

91.7 KB Created: 2021-08-03 10:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e0cdea44c9c411a76b2c614f8fe9660d SHA-1: 83b0f8a85a504ed4f934ca7765c35dc303ece66a SHA-256: fd1d708a9ccf050b1c90fce8d729505f2c045152ef8ada3fdb29be1148587d80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate an attempt to lead users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/xarasonupukutabugi.pdf In PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/wopulajejazuzalimunawa.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/21426177068.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/zutelirulesiziz.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2b3636cd---bobodemoguvu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d947b722f---gifuvofilit.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/bcc9be99439b72702c674beb6c83ac8b/47378959863.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a21fe92c313a5479cf42727f7a4f1111/29687793456.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080600e267c9---81848608091.pdfIn PDF document text
    • http://soupworld.de/upload/file/bofit.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab92b4abc---jesexubebatuma.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d5d463485a1c96089469ca490a4c0da6/fivurufezinegafutov.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/99e1874bde5082fbf47a92659eeeffbd/39994256006.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160df55fe4cd79---35872532989.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/jimitu.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/19907630025.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/pemijamokolusawo.pdfIn PDF document text
    • http://ccymgr.com/clients/a/ab/abc9983c1712fd324c9320bcfcf975a8/File/lewelexo.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/4uf69lpg4r19he98fgpllduc82/xobaguwogugoxolew.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806dfd1d1a8---41130621076.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/nufusowedobanuropepirinud.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/somowozutakokimenupikif.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/foxomaw.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/48361276675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=%D0%B3%D0%B4%D0%B7+%D0%BF%D0%BE+%D1%81%D0%B1%D0%BE%D1%80%D0%BD%D0%B8%D0%BA+%D0%B7%D0%B0%D0%B4%D0%B0%D1%87+%D0%BF%D0%BE+%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B5+9+%D0%BA%D0%BB%D0%B0%D1%81%D1%81PDF 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_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 21672 bytes
SHA-256: e07b7cecdbfd87054e8a3d440eb9e94e672eb0c3e32401d73096100ddd73d63b
font_01_sfnt_off00012b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001437d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437D 11116 bytes
SHA-256: c7ef252bc371cec3606bb7ee73f57508bf73807e40e7659f09043185d7698a01