Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e241fc9e0b11bd…

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 14:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1a982e7d1981569dfb311b18a369814 SHA-1: 96f66403b61d70dcefd886c4a02dbd91e146b5d7 SHA-256: f9e241fc9e0b11bd5fa6e880264515bf5f34f035b6344f7a16c52beebd54c6f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://laborke.ru/uplcv?utm_term=harry+potter+and+the+deathly+hallows+part+2+watch+online+123
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/08dh6i7t1gul3u3ahcfqk7vfpl/51760334773.pdf
    • http://www.awakohchang.com/image/upload/File/omulixurejogax.pdf
    • http://pm-property.pl/userfiles/file/konirawadaluvimiwal.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/vor7k6v1snm4gl4rre2n7t7cn0/wenenebikolotivetena.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a410643c252---6018350911.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091228290cc2---18243681570.pdf
    • http://aeronautike.com/userfiles/file/musijipipefikomeg.pdf
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/27212074479.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099619fa649d---25020634143.pdf
    • http://tortsurprise.ru/upload/redactor/files/fosajosegaf.pdf
    • http://modellszerviz.hu/userfiles/file/duvoxepa.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/r75s6436u2maqae679vhk801q4/85076808792.pdf
    • http://guides2alpes.fr/uploads/file/tilabinufolirufipogiwaki.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1399546961---pivivokibujovafivorozer.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d2086f146a5d8b657a2248d5208f47e5/raxen.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086124c8ebc0---80739885920.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d39c48baa4---2155535768.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c477a30b5dd---25837441587.pdf
    • http://davidhammerstein.org/userfiles/file/sumorobizobisojojuwubizit.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cba3fa3042c5e3ebafc4acce404e2cdd/devuzi.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754464e7501---6018397608.pdf
    • http://hasyo.net/files/file/54798653680.pdf
    • https://agentcctv.com/userfiles/file/rulekufamafoxotumowuz.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075edb00a9e0---jalavoji.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d2361f1dd0e22b8961f290c763883912/32627519977.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 16792 bytes
font_01_sfnt_off00011b94.bin
34a314dd90b60223551eed90002fe4cdfa2e85ef038c7488da0c032ae91ef2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B94 11144 bytes
font_02_sfnt_off000135b0.bin
67bb3dc970f9807e2f539747c3be61b0c512fd2fcf18318941c6b8b35584143a
pdf-font-stream PDF embedded font (sfnt) at offset 0x135B0 17216 bytes