Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eab771ece6b4e7c…

MALICIOUS

PDF

79.3 KB Created: 2021-07-08 05:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3e0373b2f514eb1349a403cd139804ef SHA-1: 90bae6a1e020b4249746ebb841d2a346071f5c36 SHA-256: 6eab771ece6b4e7cb933a3e505c7519323995ae80a3727196e2c1ceb1afce4c8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution vector, aligning with Spearphishing Attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://chcial.ru/uplcv?utm_term=varicose+ulcer+ankle PDF link annotation
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7476b36878869917209b456c3ab2f36a/gorumal.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/zefivatavinisefamikuje.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/7510068324.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/tnrl3c39qukpig20ulme0lassm/supelidaka.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/59771948557.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/vazovoretezifada.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/5690186262.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2d93b69c5abe1d1c9a7ace53236b88a4/9130849440.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/kizomamenemuzo.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac036a06e42---35890229094.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/gifisatogakol.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/li7os0l22tofvd3fp7n3sqia12/94820272757.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609adef45f394---47731157977.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/xiwuwilijotewutuvepir.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b8dc5d312---goxupebepaza.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/25a1b03aaaed6bca4a12daf1019a28b9/28939974759.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/jl6n8742mub6baul13d0h8p34o/rofobuzujemenezap.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/15502184716.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160749a1fa11b0---timutunetufuletole.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ea5570fd2994cdae67d2c0529984664b/93425879417.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/ec71ad00ece55881e7be9251ebcdc05d/26163549742.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c184a1250---27053134548.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/05dc2aqs688g5nbud48i57dpl5/tevumovivopup.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6fca5f2c---muwuki.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/11779182687.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 10288 bytes
SHA-256: 72cc1b66bcc309e95598107fd52811f70d18f9ca230b97e0903374ee8e1bb5d6
font_01_sfnt_off00011354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1