Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ad9065a35b46a5…

MALICIOUS

PDF

136.9 KB Created: 2021-09-03 07:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 39291ef5eeb55e2b22287ae29149e712 SHA-1: 485c03d5f68bd96477752c9459b99c337c6ce3a5 SHA-256: 80ad9065a35b46a547766ae9aaff90e64c186c414bd1152fef04dcc68d3467df
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting an attempt to drive traffic to malicious sites. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=buell+ulysses+manual+pdf PDF link annotation
    • https://ukmalayalamnews.com/userfiles/file/govumeg.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f14231d6844---kezifezoxilaw.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dfba082a0f1---wisitinomov.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eb4ee3062---rogegodakozelaxefikib.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vep7uod02h1fnejpceluejqrju/bifotatoxemak.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e20950014---61677247965.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/nobidoxaxikawipo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b881a14b328---widunubirujekifu.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/86166194ef9994e655e8e7e43e68a07f/xoguziwabotirenowesovapem.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/98683222123.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160823326f3cf0---kitujezizixo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb2af4f7c3.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/gaxafujowudokiponojuxoj.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29221d1e7f---runaxuw.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/bbbj94cq24a1aen3kd8tus54tp/90870347856.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/88499477519.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/sodenivi.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/48856017331.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/76987112858.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792069d91eb---bolegomekesoloz.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/fipekux.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/37084730186.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_off0001b26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B26B 10516 bytes
SHA-256: d624d3e97c84589318a3249c46731caae2b1ab5eb3f74d85e2c38073b7cf8d81
font_01_sfnt_off0001ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA63 19576 bytes
SHA-256: 0f24a4a05bad429785934d79fbb11959f7e159f6c9c0660a21495e2797650317
font_02_sfnt_off0001fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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