Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b188155537070e4…

MALICIOUS

PDF

149.6 KB Created: 2021-06-12 03:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 307bacec860b4b7c3b0fbcc49dab23a9 SHA-1: e8d950c7b62a0f3c2cd608c8c8c396199befa697 SHA-256: 9b188155537070e4adb514d3f32dc6a6b7b425f48067ed29e615f0128a0bf432
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=hanrahashiv+9+lucumner PDF link annotation
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160819c897a429---6190914977.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/21376870911.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ba7a9bca2---66116240320.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/konepinolovopetinib.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/bjchkh51arnrr0g5o9tbp77rl6/36440503697.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160874aecd5c4e---62810820362.pdfIn PDF document text
    • https://kede.org/userfiles/file/15688745831.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/makufefigobogoso.pdfIn PDF document text
    • http://abpaluso.com/upload/file/bufojexomunamewusixexanor.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/39450f45c0a11fc648424a68e6e97bb4/66475886477.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609c240b35956---dalidefobedowe.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099fc46e1859---ketipifofazajanesetuwuzi.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ea049d4b5---71719559033.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/rjd0r747p9b3dmce4haihccl74/80444845345.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afe64d6ca09---78398766029.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/d450d2538cf64533336438b90cfdae70/ninebomigotiniso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D06D 5216 bytes
SHA-256: 1c423fb6deb7006f8eda4e55479e714d25888f4cdd203a5b06050ed6eec3f81b
font_01_sfnt_off0001e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1FC 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA8A 10696 bytes
SHA-256: c1729d28c55e91a45fb32beee2bb5aa1bdac371508483411564c3fe5d43e3ce5
font_03_sfnt_off00020f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F32 28292 bytes
SHA-256: c75a6b4b70c05a04d4bdfde6aa9a04453926b6e4fad91f92a62206760fcb2197

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