Malicious PDF — malware analysis report

Static analysis result for SHA-256 78966e2f863d299f…

MALICIOUS

PDF

82.4 KB Created: 2021-06-27 14:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ef6447ca55c490266976d7c3dea74bfd SHA-1: 2ccb4f6e3d713b95b691e1a7459617086646f105 SHA-256: 78966e2f863d299f9d6ddc4bb9fc0967a889fda92d913b5341d674e187da78dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' indicates the document may be disguised as an invoice or payment request to encourage user interaction with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccad9f08f6---jefirite.pdf In PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1acd847a9c0c4ec5bf1ba9f6029fafd6/50988931965.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/42405090213.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210531025438.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/retunemotilin.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/sorikenik.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/52ca7595ee67f963f8c1b118260096e1/47473548669.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2b09a07fcaad2f0d42969e194bec6b86/40238960856.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/keniwurodipavesemojeru.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/76105148593.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/471e044854d596490d7597b9b07fa336/pogejixis.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/52200167731.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/7dc75f3dbb056ef8da5dd3d1f94b6508/6479191501.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/83e9df41629d89f540db2c52dc8be311/99987215425.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae3fe3f2b---82044663900.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609251737161a---26586045198.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/08682f78e623256ea3fb1c426e7c0de3/62968123915.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48723694d3---ragugokuzigopima.pdfIn PDF document text
    • http://productosole.com/wp-content/plugins/super-forms/uploads/php/files/65n2cfeblvjcj29b6u6mdh92ko/29455946272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=notes+to+financial+statements+definitionPDF 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_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 15944 bytes
SHA-256: 89d4fe2b94c51f1e0bb605ba0a522f0002cbda7688da7432d0d4a005a43ee8d7
font_01_sfnt_off00010c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C71 10512 bytes
SHA-256: c99f1a315e24b75a7ccf5b100df377cf2d46d6503e41288772a2ec2bf7103eae
font_02_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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