Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee4410a6d22f5cd…

MALICIOUS

PDF

87.0 KB Created: 2021-08-01 11:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 42cf8edd5c7dbee3d23e9e8e06eaf253 SHA-1: 7c9898fa375e438527aa6190ca75f770a344c95e SHA-256: cee4410a6d22f5cdacbb94e49b3bd78f1f19758be59e492ea5d636e8445b5819
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites using common form plugins. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. While no scripts were extracted, the structure and URL patterns suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5302558684---kidixuz.pdf In PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607436d7df12c---vixuwodise.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f99d3a7ac---nafesobivatugafavijunur.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/30eaaae46e430f8d96c7ed0cb6537273/74812970893.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/nejer.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/477ea6f04ec1ca34399682ed700a5877/87377999071.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/1v59g8487nas7c1lv38m3edu3l/fuxol.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/b876d21998a254088af0c7f2e3811339/ridupakupogi.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/uro6gv1ao9b6075qgncl4eeja2/mojikakurorejepin.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/79074353611.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acb5bfbb325---52633378271.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/d258a62a2f190d44ad13dfce31faa415.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/49858afffbf521e6853ca3fb01aeb8fd/42380481095.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/vubibukazakebeno.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/irqc54ac8nf6tq5ntlm88igt5g/mowogipiromadutawusiku.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096531cae80b---29371321011.pdfIn PDF document text
    • http://makaroma.fr/upload/file/wupix.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c505b753548---fuzetetelufodaf.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c882af7509c---siwositupazipuju.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/c8c60b77aba444c8c7aaf3e19ed7ace7/norolewuraxofiwanepagez.pdfIn PDF document text
    • http://dentistturkey.com/image/files/runamudesiziluzakadix.pdfIn PDF document text
    • http://cecev.com/stockages/files/34688068642.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/moxogav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+much+is+a+husky+puppy+costPDF 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_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 10640 bytes
SHA-256: 0f7029a5edfecdff65458e2ae9c45af3c5072062845275dc27e76adffddd3482
font_01_sfnt_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 16632 bytes
SHA-256: ff3fb08cfa6e54c41e0c7bf7e149dde2ba3b8e4cabcc207e72d64ca5657eb9b1
font_02_sfnt_off00013679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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