Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fc746794cb6737…

MALICIOUS

PDF

99.5 KB Created: 2021-07-14 03:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2c2ee2113f90b1b2c7184c9219c1bfe6 SHA-1: 75e119ebb749c3c6737f18057303d8ee96183046 SHA-256: 85fc746794cb67378d4c310df1eaf613d9f053a6ebf1420f56bdd982d9ea0c2c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. The document's content and heuristics indicate it's designed as a lure for remote support tools, likely to facilitate unauthorized access. Several URLs point to compromised WordPress sites and other potentially malicious hosting, suggesting a multi-stage attack involving the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf2210922b---turopix.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e8afd4395a6---wenivavaxodikovadoxe.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/89898919699.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab299378cc3---84337149554.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/tupiti.pdfIn PDF document text
    • http://kasargod.net/uploads/file/73732729246.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/dolomusikumewariz.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/84249261983.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/fepemasagepipik.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/346b86b1fc4bbc37c5a9835751bb5442/gulop.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/44461944021.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746ea3ea9f5---jifoguxixuwuzadabi.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/siwilabonuwovotopixazoxo.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7137c9121ae0959c2c86c4219ea82da8/88830357298.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160aac9a77bbca---fopopubovupasedesuv.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/xuxuzopigul.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c56b0059f9---bawijakalupifefadatufu.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/xexisufaxoj.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///34810505425.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/suxupitazawolowijisamato.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/lusakimoguwilafego.pdfIn PDF document text
    • http://ciskmv.com/css/file/nixixoxuvirilemekoz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/918967ca4ab0d4a739ab3a959cd6e750/86632579749.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/406270e9c0b88b428e9f059c95d9e816/62297063688.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca91660d2---lowizejipezikuzikeburajuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=born+this+way+outfitPDF 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_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 10484 bytes
SHA-256: 35aacbb1cb44a9045b7f57346b22fea7d2ba9726d93e7dc34a5dfdcd9b265a8a
font_01_sfnt_off00013abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D0 17244 bytes
SHA-256: 13fdaceb0b90bb22481b4f7c306edc6c4d276c969bbf58155774b975695c66c1