Malicious PDF — malware analysis report

Static analysis result for SHA-256 964c79fceae6a44f…

MALICIOUS

PDF

73.1 KB Created: 2021-09-07 20:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9c72e5a2dcc0f56c2aa4b0ce5fab3b2d SHA-1: bbe4da722500f25c77dc214865f7bf406959f694 SHA-256: 964c79fceae6a44f6ada7c18047f9bf3c3e41f804a7077636a310055a56e489b
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 for Pdf.Phishing.Trojan. The presence of numerous URLs pointing to compromised CMS upload storage and disposable hosting indicates a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly suggests an attempt to deliver a phishing or malware payload.

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 http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160814caa7760f---foxotudejowux.pdf In PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b824ded77daee0ced4593ee5453b9d2d/85878787069.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607045a9cf5c4---78632497913.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/27036489103.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d608ed1ecf---63224441008.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7e119ea46a5ff20c6753286d0bfbd4fc/6287662228.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ac0e71403f712a35f2f18fea3f00c4b4/mudod.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/tejedigusizik.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072794e12d17---jizamesaruwaj.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m3ua95ert62fninna33fada5ji/jekizizodozibel.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/47047251598.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/88849513292.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/gapanemoziwosewetar.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/xejuwelipotos.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607be5c04a5b6---71760405574.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/3285937dba924f94230a098bd5fdab67/32342046450.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/kukuwigopifogusamugomev.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/16369707897.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/rogezawikokosixorujida.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/cd52f82b4f22631056471a23adf7b484/64153963672.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5c60a041---gonejixoxuzetinesegasam.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a395a2775919d492486ad48393b6651f/fuxoduwufakadu.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8d788fbab8560a2b02dbf3610457ffd4/76998446280.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/sulesapujesaxubomapikip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=convertir+archivo+jpg+a+pdf+onlinePDF 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_off0000bd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD56 15812 bytes
SHA-256: dfe32a84c778b45826e232452a340a40bcce042f3556b8934aee3e1412c85c06
font_01_sfnt_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 10956 bytes
SHA-256: 06e8c623f0c2fb58b734f779b51600d67a0427278293e3d615f8c52376e78a5e