Malicious PDF — malware analysis report

Static analysis result for SHA-256 468e2696e3e0a3ed…

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 22:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0ded93252a1277b9a862093002a9040a SHA-1: 84cc439f83c06b96d2163738c81e749889053070 SHA-256: 468e2696e3e0a3ed8d13c774aa688bd5b485851a9478103a83089dddd394d8de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to direct users to malicious or SEO-manipulated content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cructi.ru/uplcv?utm_term=tangent+questions+and+answers PDF link annotation
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc5df5bc9c---nomor.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085b10372a0f---58653073950.pdfIn PDF document text
    • http://land89.com/ckupload/files/wodovugaw.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/127ef602f30dccc19bd87b674832646e/mirezosazaj.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607883e6e818b---43432056942.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/60426900921.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/69940095940.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/nevirajefomuli.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/wofonokotawax.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f0d29a6c---gulerojisisizukap.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b59aa953553725908d21aa77f1ecba3e/25509394109.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/clq81h8h4fb4b60uo9a8ecadn7/43994256171.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/pu1riq5jsr5c7q1529k86ejjd2/fabufepotujo.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/cb278b928aace087a1874908748b6f13/senazedilulul.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1886d0d40553a0d8456d89d466231de1/11482096900.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d5aa0319a---97049116279.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/06/202106272143148108.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0f39ec4b89a192447169aad5dc08c467/fobamotizifivuzeg.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/30809272144.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/1452851530.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608505cad4ee0---72091108975.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/59957218782.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_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 10672 bytes
SHA-256: 606ba20946604a2e4be028bccefc403d6e45792541b100debc33df7c8a4ff23b
font_01_sfnt_off000107ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 17612 bytes
SHA-256: 40f477f6d767b98de519822b2092f6de61de94d30dbb7a42229bd048abeb2294
font_02_sfnt_off00013665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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