Malicious PDF — malware analysis report

Static analysis result for SHA-256 0262cbe6fbfb8be2…

MALICIOUS

PDF

73.1 KB Created: 2021-08-11 13:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: effe23958fd47f6e4d3d9389876b18e6 SHA-1: af25f25704efd8f01e0ff2ec2e68298db791efe7 SHA-256: 0262cbe6fbfb8be276f5b32b4bb05d85cb16f40fcef7607882121e314d73ec45
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=fireboy+and+watergirl+forest+temple+again+unblocked+tyrone PDF link annotation
    • http://lsneotek.com/ckupload/files/8554908834.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/dubewafikanelenufajawo.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/08f08d3605a9bddc57ed7b3e26df889e/14998098196.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e4dc6d78a71054061b50731982b523b7/19158145613.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/turoxexokami.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/m96tg3epfbd80uqlcil9u3jt31/49573270746.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30692a34b2---gawunizakezubajusatuwexe.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/57140486579.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/kixozuxixujebitamitemezi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/r3v3ld5tl73ghhrajlngsblit7/56247362904.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a035cef909---labipeg.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/17a328cb4df1824e83d837520414944f/55955009446.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6975d0c3d35eeae52ae6ed5496020140/vumegogunofovi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160955fe983d1e---67246595352.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/5548471784.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/mutilelaxik.pdfIn PDF document text
    • https://questyme.com/userfiles/file/baniderajufusufinavopuro.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/57451255948.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/811a7c2565ca5f24a7cef052caf7b96e/33917242834.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ec481498c---kisiduvopupe.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/411e1b838da6012a8a6829b97ada1fad/36028400247.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/4227567094.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9453b34d71---54843890940.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/mefipalu.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fd18f94284bf8d9898cb63ea7af8cb7b/99670460480.pdfIn PDF document text
    • 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_off0000bda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA9 14948 bytes
SHA-256: c9590064db65bbc8ce795cdfa5f72fd65216dca73913e8ef56aed61a0adf234f
font_01_sfnt_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 11472 bytes
SHA-256: 3dd54f5fbe5839ead44eaf5fb30fa5972c2c23b74d3a0eafa476b169daf9a83e
font_02_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1