Malicious PDF — malware analysis report

Static analysis result for SHA-256 206186bb0764d20d…

MALICIOUS

PDF

84.0 KB Created: 2021-07-07 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dd6cd8c4cc50e9e1029113f0f3f7fb6a SHA-1: 8c48703639f9d841d6c13529805424925dd49b6c SHA-256: 206186bb0764d20de5868bbcc8a13d15395c3ed43460f752bac75a144cfaebb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://alphabodysupplements.com/newerac2c/userfiles/file/rixasajirukoboduxizane.pdf In PDF document text
    • http://phonphangschool.com/upload/files/57053410459.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/rodomonavago.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083547af3972---kelirepawofenofoxor.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/f87612b5342fdffcfcfcb23c10f134c4/sufapidukipo.pdfIn PDF document text
    • http://goref.ru/files/file/88050397476.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ef76abf2ce2592f9f75b8c5f0da0541e/sifitijofivifobujaxunadun.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/dabepaxomivobifus.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3f3c3ac8d9601e6f0be7e42273a70a3a/83294673540.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b03e80911c1---6533933034.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/07/files/210704200144.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e694ef13f---zovukado.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/32743720722.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/venitukiwa.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf95dbbb34c---rutamerabejoxudoxogored.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/2fb4fce00bf8bfde779c0e51139c1d9c/miretosiwadulilad.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3f71bed897b34813a969e89c594c2b02/xeverewewabomiwu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160baa101f25a5---14641915085.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lbpagr5kpfdv8al8310m80vpo4/24026082611.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/xolunuxodeze.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/af7fd42a3d585f06e7334780ae88c438/fipamamajodebisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=signs+of+hypothermiaPDF 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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 10948 bytes
SHA-256: ef9768b7cfe4d100ce27af2d0bb03d4ce5aee6096fbb01a7ef4818be86efeedf
font_01_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 16688 bytes
SHA-256: f3819fc5c15797fb47c05a69ff098d4bacf0d65d16a27af52b0e9013c4657007
font_02_sfnt_off00012ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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