Malicious PDF — malware analysis report

Static analysis result for SHA-256 82af80c6715ebccf…

MALICIOUS

PDF

88.6 KB Created: 2021-08-18 07:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3e5839f8fa5799b276f535adfce953e SHA-1: 881b33b3d820c47e49ba2bb544b406a41c04f811 SHA-256: 82af80c6715ebccfcbed2fd485cd84d88290cc580d05bf8c9ff5182190aeb183
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/mt7c4eqffkl696354vijij6ne1/11786799300.pdf In PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c26799ad44---werefajaximexu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/a4atmt7kml460fbk4739kp15dg/xodirogamazugu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830795e59f9---76798507892.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/53479241070.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/19614270200.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c704cdddb43---janivevazujobadivepu.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/gexatojipedozo.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/jivezokeg.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/f9r03sjk03hc7ilinbh46471pv/46344034495.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/66779949165.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/cuncfa658egmh8v2hae6edv1co/galixenu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/445649e4fe5177687b1b8200fa62c0fc/22650983543.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/32488514289.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/2203815146.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/rejupo.pdfIn PDF document text
    • http://ipublicity.cz/data/file/68605158807.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/944pnj0lbhalsvmg6ac24pc98f/50326283762.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/jozidufisefiwubaloju.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085257c8513c---84184780798.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5fbca7f88a---disanopen.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/mujevuzawinedir.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d3b31ba458a79c0896c89c9e80c0f77/wedododowuret.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/34981535662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=que+es+un+silabario+en+inglesPDF 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_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 19048 bytes
SHA-256: 1c690234030cbd435ba1b87c866caf8c88f4958cd059552b487091653d7b648b
font_02_sfnt_off00013a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A01 10484 bytes
SHA-256: 1f23ddee75b276f5fddac475ab4641dfd34ba69fec3754177bdc92134a0c39ea